mysqld man page on aLinux

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MYSQLD(8)		     MySQL Database System		     MYSQLD(8)

NAME
       mysqld - the MySQL server

SYNOPSIS
       mysqld [options]

DESCRIPTION
       mysqld is the MySQL server. The following discussion covers these MySQL
       server configuration topics:

       ·  Startup options that the server supports

       ·  Server system variables

       ·  Server status variables

       ·  How to set the server SQL mode

       ·  The server shutdown process

Note: Not all storage engines are supported by all MySQL server binaries and
configurations. To find out how to determine which storage engines are
supported by your MySQL server installation, see Section 5.4.10, “SHOW ENGINES
Syntax”.

OPTION AND VARIABLE REFERENCE
       The following table provides a list of all the command line options,
       server and status variables applicable within mysqld.

       The table lists command line options (Cmd-line), options valid in
       configuration files (Option file), server system variables (Server
       Var), and status variables (Status var) in one unified list, with
       notification of where each option/variable is valid. If a server option
       set on the command line or in an option file differs from the name of
       the corresponding server system or status variable, the variable name
       is noted immediately below the corresponding option. For status
       variables, the scope of the variable is shown (Scope) as either global,
       session, or both. Please see the corresponding sections for details on
       setting and using the options and variables. Where appropriate, a
       direct link to further information on the item as available.

       Note
       This table is part of an ongoing process to expand and simplify the
       information provided on these elements. Further improvements to the
       table, and corresponding descriptions will be applied over the coming
       months.

       ┌─────────────────────────────────────┬──────────┬─────────────┬────────────┬────────────┬───────────┐
       │Name				     │ Cmd-line │ Option file │ Server Var │ Status Var │ Var Scope │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │abort-slave-event-count		     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │back_log			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_replace			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_replace_select		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_reset			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_restore_table		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_revoke			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_revoke_all			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_rollback			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_savepoint			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_select			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_set_option			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │basedir				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_binlog_events		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_binlogs		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_charsets		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_collations		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_column_types		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_create_db		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_create_event		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_create_table		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_databases		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_engine_logs		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_engine_mutex		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_engine_status		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_errors			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_events			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_fields			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_grants			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_keys			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_master_status		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_new_master		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_open_tables		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: have_bdb		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_plugins		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_privileges		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_processlist		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_slave_hosts		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_slave_status		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_status			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_storage_engines	     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_tables			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_triggers		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_variables		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-home			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_show_warnings		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_slave_start			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_slave_stop			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_stmt_close			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_stmt_execute		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_stmt_fetch			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_stmt_prepare		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_stmt_reset			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_stmt_send_long_data		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_truncate			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: bdb_home		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_unlock_tables		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_update			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_update_multi		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_xa_commit			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_xa_end			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_xa_prepare			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_xa_recover			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_xa_rollback			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_xa_start			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │completion-type			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-lock-detect			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Compression			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │concurrent-insert		     │	  Y	│      Y      │		   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable:			     │		│	      │	    Y	   │		│  global   │
       │concurrent_insert		     │		│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │connect_timeout			     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Connections			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │console				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │core-file			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Created_tmp_disk_tables		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Created_tmp_files		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Created_tmp_tables		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-logdir			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │datadir				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │date_format			     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │datetime_format			     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │default-character-set		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │default-collation		     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │default-storage-engine		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │default-table-type		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │default-time-zone		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │default_week_format		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │defaults-extra-file		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: bdb_logdir		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │defaults-file			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │delay-key-write			     │	  Y	│      Y      │		   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable:			     │		│	      │	    Y	   │		│  global   │
       │delay_key_write			     │		│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │delay-key-write-for-all-tables	     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Delayed_errors			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │delayed_insert_limit		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Delayed_insert_threads		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │delayed_insert_timeout		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │delayed_queue_size		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Delayed_writes			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-no-recover			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │des-key-file			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │disconnect-slave-event-count	     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │div_precision_increment		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │enable-locking			     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │enable-pstack			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │engine-condition-pushdown	     │	  Y	│      Y      │		   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable:			     │		│	      │	    Y	   │		│   both    │
       │engine_condition_pushdown	     │		│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │error_count			     │		│	      │		   │	 Y	│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │exit-info			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │expire_logs_days		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Aborted_clients			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-no-sync			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │external-locking		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │flush				     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Flush_commands			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │flush_time			     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │foreign_key_checks		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ft_boolean_syntax		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ft_max_word_len			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ft_min_word_len			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ft_query_expansion_limit	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ft_stopword_file		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-shared-data			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │gdb				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │group_concat_max_len		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_commit			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_delete			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_discover		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_prepare			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_read_first		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_read_key		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_read_next		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_read_prev		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: bdb_shared_data	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_read_rnd		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_read_rnd_next		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_rollback		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_savepoint		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_savepoint_rollback	     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_update			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Handler_write			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │help				     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │identity			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │init-connect			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb-tmpdir			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: init_connect	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │init-file			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: init_file		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │init-rpl-role			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │init-slave			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: init_slave		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_additional_mem_pool_size	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_autoextend_increment	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_buffer_pool_awe_mem_mb	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: bdb_tmpdir		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_buffer_pool_size		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_checksums		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_commit_concurrency	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_concurrency_tickets	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_data_file_path		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_data_home_dir		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_doublewrite		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_fast_shutdown		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_file_io_threads		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_file_per_table		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb_cache_size			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_flush_log_at_trx_commit	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_flush_method		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_force_recovery		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_lock_wait_timeout	     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_locks_unsafe_for_binlog	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_log_arch_dir		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_log_archive		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_log_buffer_size		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_log_file_size		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_log_files_in_group	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb_lock_max			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_log_group_home_dir	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_max_dirty_pages_pct	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_max_purge_lag		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_mirrored_log_groups	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_open_files		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_status_file		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_support_xa		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_sync_spin_loops		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_table_locks		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_thread_concurrency	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb_log_buffer_size		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │innodb_thread_sleep_delay	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │insert_id			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │interactive_timeout		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │isam				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │join_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_blocks_not_flushed		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_blocks_unused		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_blocks_used			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │key_buffer_size			     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │key_cache_age_threshold		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bdb_max_lock			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │key_cache_block_size		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │key_cache_division_limit	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_read_requests		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_reads			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_write_requests		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Key_writes			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │language			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │large-pages			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │last_insert_id			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Last_query_cost			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │big-tables			     │	  Y	│      Y      │		   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │lc_time_names			     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │license				     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │local-infile			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: local_infile	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-bin				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-bin-index			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-bin-trust-function-creators	     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable:			     │		│	      │	    Y	   │		│	    │
       │log_bin_trust_function_creators	     │		│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-bin-trust-routine-creators	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Aborted_connects		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: big_tables		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-error			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-isam			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-long-format			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-short-format		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-slave-updates		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-slow-admin-statements	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-slow-queries		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: log_slow_queries	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-tc				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-tc-size			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bind-address			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-update			     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │log-warnings			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: log_warnings	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │long_query_time			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │low-priority-updates		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable:			     │		│	      │	    Y	   │		│	    │
       │low_priority_updates		     │		│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │lower_case_table_names		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-connect-retry		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-host			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-info-file		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │binlog-do-db			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-password			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-port			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-retry-count		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-ssl			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-ssl-ca			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-ssl-capath		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-ssl-cert			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-ssl-cipher		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-ssl-key			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │master-user			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │binlog-ignore-db		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max-binlog-dump-events		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_allowed_packet		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_binlog_cache_size		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_binlog_size			     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_connect_errors		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_connections			     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_delayed_threads		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_error_count			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_heap_table_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_insert_delayed_threads	     │		│	      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Binlog_cache_disk_use		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_join_size			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_length_for_sort_data	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_prepared_stmt_count		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_relay_log_size		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_seeks_for_key		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_sort_length			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_sp_recursion_depth		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_tmp_tables			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Max_used_connections		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_user_connections		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │binlog_cache_size		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │max_write_lock_count		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │memlock				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: locked_in_memory	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │merge				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │multi_range_count		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │multi_read_range		     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam-recover			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_block_size		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_data_pointer_size	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_max_extra_sort_file_size	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Binlog_cache_use		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_max_sort_file_size	     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_repair_threads		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_sort_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │myisam_stats_method		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-autoincrement-prefetch-sz	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-cache-check-time		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-connectstring		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-distribution		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-index-stat-cache-entries	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-index-stat-enable		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bootstrap			     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-index-stat-update-freq	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-mgmd-host			     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-optimized-node-selection	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-report-thresh-binlog-epoch-slip3 │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb-report-thresh-binlog-mem-usage10 │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb_extra_logging		     │		│	      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndb_use_exact_count		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ndbcluster			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │net_buffer_length		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │net_read_timeout		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │bulk_insert_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │net_retry_count			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │net_write_timeout		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │new				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │no-defaults			     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Not_flushed_delayed_rows	     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │old-passwords			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: old_passwords	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │old-style-user-limits		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Open_files			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │open_files_limit		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Bytes_received			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Open_streams			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Open_table_definitions		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Open_tables			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Opened_tables			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │optimizer_prune_level		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │optimizer_search_depth		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │pid-file			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │port				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │port-open-timeout		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │preload_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │allow-suspicious-udfs		     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Bytes_sent			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │print-defaults			     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_free_blocks		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_free_memory		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_hits			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_inserts			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_lowmem_prunes		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_not_cached		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_queries_in_cache		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Qcache_total_blocks		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_alloc_block_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character-set-client-handshake	     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_cache_limit		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_cache_min_res_unit	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_cache_size		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_cache_type		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_cache_wlock_invalidate	     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │query_prealloc_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Questions			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │range_alloc_block_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │read_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │read_only			     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character-set-filesystem	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │read_rnd_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │record_buffer			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │relay-log			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │relay-log-index			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │relay-log-info-file		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │relay_log_purge			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │relay_log_space_limit		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-do-db			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-do-table		     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-ignore-db		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character-set-server		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-ignore-table		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-rewrite-db		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-same-server-id	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-wild-do-table		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │replicate-wild-ignore-table	     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │report-host			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │report-password			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │report-port			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │report-user			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │rpl-recovery-rank		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: character_set_server     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: rpl_recovery_rank	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Rpl_status			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │safe-mode			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │safe-show-database		     │	  Y	│      Y      │		   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: safe_show_database	     │		│	      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │safe-user-create		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │safemalloc-mem-limit		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │secure-auth			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: secure_auth		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Select_full_join		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character-sets-dir		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Select_full_range_join		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Select_range			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Select_range_check		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Select_scan			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │server-id			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: server_id		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │set-variable			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │show-slave-auth-info		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-automatic-sp-privileges	     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-bdb			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character_set_client		     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: have_bdb		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-character-set-client-handshake  │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-external-locking		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: external-locking	     │		│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-grant-tables		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-host-cache			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-innodb			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-innodb-checksums		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-innodb-doublewrite		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: innodb_doublewrite	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character_set_connection	     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-large-pages		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: large-pages		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-locking			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-merge			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: merge		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-name-resolve		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-networking			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-new			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-show-database		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-slave-start		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │character_set_results		     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-stack-trace		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-symbolic-links		     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-symlink			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-sync-bdb-logs		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │skip-thread-priority		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │slave-load-tmpdir		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │slave-skip-errors		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │slave_compressed_protocol	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │slave_net_timeout		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Slave_open_temp_tables		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │chroot				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Slave_retried_transactions	     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Slave_running			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │slave_transaction_retries	     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Slow_launch_threads		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │slow_launch_time		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Slow_queries			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │socket				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sort_buffer_size		     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Sort_merge_passes		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Sort_range			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ansi				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │collation-server		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Sort_rows			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Sort_scan			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sporadic-binlog-dump-fail	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql-bin-update-same		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql-mode			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: sql_mode		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_auto_is_null		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_big_selects			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_big_tables			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_buffer_result		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: collation_server	     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_log_bin			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_log_off			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_log_update			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_low_priority_updates	     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_max_join_size		     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_notes			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_quote_show_create		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_safe_updates		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_select_limit		     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_slave_skip_counter		     │		│	      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_admin_commands		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sql_warnings			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ssl				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ssl-ca				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ssl-capath			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ssl-cert			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ssl-cipher			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │ssl-key				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │storage_engine			     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │symbolic-links			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sync-bdb-logs			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_alter_db			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sync-binlog			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: sync_binlog		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sync-frm			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │- Variable: sync_frm		     │		│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │sysdate-is-now			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │table_cache			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │table_lock_wait_timeout		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Table_locks_immediate		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Table_locks_waited		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │table_open_cache		     │		│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_alter_event			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │table_type			     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │tc-heuristic-recover		     │	  Y	│	      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Tc_log_max_pages_used		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Tc_log_page_size		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Tc_log_page_waits		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │temp-pool			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │thread_cache_size		     │	  Y	│      Y      │	    Y	   │		│  global   │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │thread_concurrency		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │thread_stack			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Threads_cached			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_alter_table			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Threads_connected		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Threads_created			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Threads_running			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │time_format			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │time_zone			     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │timed_mutexes			     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │timestamp			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │tmp_table_size			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │tmpdir				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │transaction-isolation		     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_analyze			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │transaction_alloc_block_size	     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │transaction_prealloc_size	     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │tx_isolation			     │		│	      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │unique_checks			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │updatable_views_with_limit	     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Uptime				     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │user				     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │verbose				     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │version				     │	  Y	│	      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │wait_timeout			     │	  Y	│      Y      │	    Y	   │		│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_backup_table		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │warning_count			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │warnings			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │with-debug			     │	  Y	│      Y      │		   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_begin			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_change_db			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │auto-increment-increment	     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_change_master		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_check			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_checksum			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_commit			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_create_db			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_create_event		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_create_function		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_create_index		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_create_table		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_dealloc_sql			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │auto-increment-offset		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_delete			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_delete_multi		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_do				     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_drop_db			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_drop_event			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_drop_function		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_drop_index			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_drop_table			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_drop_user			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_execute_sql			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │autocommit			     │		│	      │	    Y	   │		│  session  │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_flush			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_grant			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_ha_close			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_ha_open			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_ha_read			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_help			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_insert			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_insert_select		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_kill			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_load			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │automatic-sp-privileges		     │	  Y	│      Y      │	    Y	   │		│	    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_load_master_data		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_load_master_table		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_lock_tables			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_optimize			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_preload_keys		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_prepare_sql			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_purge			     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_purge_before_date		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_rename_table		     │		│	      │		   │	 Y	│   both    │
       ├─────────────────────────────────────┼──────────┼─────────────┼────────────┼────────────┼───────────┤
       │Com_repair			     │		│	      │		   │	 Y	│   both    │
       └─────────────────────────────────────┴──────────┴─────────────┴────────────┴────────────┴───────────┘

COMMAND OPTIONS
       When you start the mysqld server, you can specify program options using
       any of the methods described in Section 3, “Specifying Program
       Options”. The most common methods are to provide options in an option
       file or on the command line. However, in most cases it is desirable to
       make sure that the server uses the same options each time it runs. The
       best way to ensure this is to list them in an option file. See
       Section 3.2, “Using Option Files”.

       mysqld reads options from the [mysqld] and [server] groups.
       mysqld_safe reads options from the [mysqld], [server], [mysqld_safe],
       and [safe_mysqld] groups.  mysql.server reads options from the [mysqld]
       and [mysql.server] groups.

       An embedded MySQL server usually reads options from the [server],
       [embedded], and [xxxxx_SERVER] groups, where xxxxx is the name of the
       application into which the server is embedded.

       mysqld accepts many command options. For a brief summary, execute
       mysqld --help. To see the full list, use mysqld --verbose --help.

       The following list shows some of the most common server options.
       Additional options are described in other sections:

       ·  Options that affect security: See Section 5.3, “Security-Related
	  mysqld Options”.

       ·  SSL-related options: See Section 7.7.3, “SSL Command Options”.

       ·  Binary log control options: See Section 10.3, “The Binary Log”.

       ·  Replication-related options: See Section 8, “Replication Startup
	  Options”.

       ·  Options specific to particular storage engines: See Section 1.1,
	  “MyISAM Startup Options”, Section 5.3, “BDB Startup Options”,
	  Section 2.4, “InnoDB Startup Options and System Variables”, and
	  Section 6.5.1, “MySQL Cluster-Related Command Options for mysqld”.

You can also set the values of server system variables by using variable names
as options, as described later in this section.

·  --help, -?

   Display a short help message and exit. Use both the --verbose and --help
   options to see the full message.

·  --allow-suspicious-udfs

   This option controls whether user-defined functions that have only an xxx
   symbol for the main function can be loaded. By default, the option is off
   and only UDFs that have at least one auxiliary symbol can be loaded; this
   prevents attempts at loading functions from shared object files other than
   those containing legitimate UDFs. This option was added in version 5.0.3.
   See Section 2.4.6, “User-Defined Function Security Precautions”.

·  --ansi

   Use standard (ANSI) SQL syntax instead of MySQL syntax. For more precise
   control over the server SQL mode, use the --sql-mode option instead. See
   Section 9.3, “Running MySQL in ANSI Mode”, and the section called “SQL
   MODES”.

·  --basedir=path, -b path

   The path to the MySQL installation directory. All paths are usually
   resolved relative to this directory.

·  big-tables

   Allow large result sets by saving all temporary sets in files. This option
   prevents most “table full” errors, but also slows down queries for which
   in-memory tables would suffice. Since MySQL 3.23.2, the server is able to
   handle large result sets automatically by using memory for small temporary
   tables and switching to disk tables where necessary.

·  --bind-address=IP

   The IP address to bind to.

·  --bootstrap

   This option is used by the mysql_install_db script to create the MySQL
   privilege tables without having to start a full MySQL server.

·  --character-sets-dir=path

   The directory where character sets are installed. See Section 9.1, “The
   Character Set Used for Data and Sorting”.

·  --character-set-client-handshake

   Don't ignore character set information sent by the client. To ignore client
   information and use the default server character set, use
   --skip-character-set-client-handshake; this makes MySQL behave like MySQL
   4.0.

·  --character-set-filesystem=charset_name

   The filesystem character set. This option sets the character_set_filesystem
   system variable. It was added in MySQL 5.0.19.

·  --character-set-server=charset_name, -C charset_name

   Use charset_name as the default server character set. See Section 9.1, “The
   Character Set Used for Data and Sorting”. If you use this option to specify
   a non-default character set, you should also use --collation-server to
   specify the collation.

·  --chroot=path

   Put the mysqld server in a closed environment during startup by using the
   chroot() system call. This is a recommended security measure. Note that use
   of this option somewhat limits LOAD DATA INFILE and SELECT ... INTO
   OUTFILE.

·  --collation-server=collation_name

   Use collation_name as the default server collation. See Section 9.1, “The
   Character Set Used for Data and Sorting”.

·  --console

   (Windows only.) Write error log messages to stderr and stdout even if
   --log-error is specified.  mysqld does not close the console window if this
   option is used.

·  --core-file

   Write a core file if mysqld dies. For some systems, you must also specify
   the --core-file-size option to mysqld_safe. See mysqld_safe(1). Note that
   on some systems, such as Solaris, you do not get a core file if you are
   also using the --user option.

·  --datadir=path, -h path

   The path to the data directory.

·  --debug[=debug_options], -# [debug_options]

   If MySQL is configured with --with-debug, you can use this option to get a
   trace file of what mysqld is doing. The debug_options string often is
   ´d:t:o,file_name'. The default is ´d:t:i:o,mysqld.trace'. See Section 1.2,
   “Creating Trace Files”.

   As of MySQL 5.0.25, using --with-debug to configure MySQL with debugging
   support enables you to use the --debug="d,parser_debug" option when you
   start the server. This causes the Bison parser that is used to process SQL
   statements to dump a parser trace to the server's standard error output.
   Typically, this output is written to the error log.

·  --default-character-set=charset_name (DEPRECATED)

   Use charset_name as the default character set. This option is deprecated in
   favor of --character-set-server. See Section 9.1, “The Character Set Used
   for Data and Sorting”.

·  --default-collation=collation_name

   Use collation_name as the default collation. This option is deprecated in
   favor of --collation-server. See Section 9.1, “The Character Set Used for
   Data and Sorting”.

·  --default-storage-engine=type

   Set the default storage engine (table type) for tables. See Chapter 14,
   Storage Engines and Table Types.

·  --default-table-type=type

   This option is a synonym for --default-storage-engine.

·  --default-time-zone=timezone

   Set the default server time zone. This option sets the global time_zone
   system variable. If this option is not given, the default time zone is the
   same as the system time zone (given by the value of the system_time_zone
   system variable.

·  --delay-key-write[={OFF|ON|ALL}]

   Specify how to use delayed key writes. Delayed key writing causes key
   buffers not to be flushed between writes for MyISAM tables.	OFF disables
   delayed key writes.	ON enables delayed key writes for those tables that
   were created with the DELAY_KEY_WRITE option.  ALL delays key writes for
   all MyISAM tables. See Section 5.2, “Tuning Server Parameters”, and
   Section 1.1, “MyISAM Startup Options”.

   Note: If you set this variable to ALL, you should not use MyISAM tables
   from within another program (such as another MySQL server or myisamchk)
   when the tables are in use. Doing so leads to index corruption.

·  --des-key-file=file_name

   Read the default DES keys from this file. These keys are used by the
   DES_ENCRYPT() and DES_DECRYPT() functions.

·  --enable-named-pipe

   Enable support for named pipes. This option applies only on Windows NT,
   2000, XP, and 2003 systems, and can be used only with the mysqld-nt and
   mysqld-max-nt servers that support named-pipe connections.

·  --exit-info[=flags], -T [flags]

   This is a bit mask of different flags that you can use for debugging the
   mysqld server. Do not use this option unless you know exactly what it does!

·  --external-locking

   Enable external locking (system locking), which is disabled by default as
   of MySQL 4.0. Note that if you use this option on a system on which lockd
   does not fully work (such as Linux), it is easy for mysqld to deadlock.
   This option previously was named --enable-locking.

   Note: If you use this option to enable updates to MyISAM tables from many
   MySQL processes, you must ensure that the following conditions are
   satisfied:

   ·  You should not use the query cache for queries that use tables that are
      updated by another process.

   ·  You should not use --delay-key-write=ALL or DELAY_KEY_WRITE=1 on any
      shared tables.

   The easiest way to ensure this is to always use --external-locking together
   with --delay-key-write=OFF and --query-cache-size=0. (This is not done by
   default because in many setups it is useful to have a mixture of the
   preceding options.)

·  --flush

   Flush (synchronize) all changes to disk after each SQL statement. Normally,
   MySQL does a write of all changes to disk only after each SQL statement and
   lets the operating system handle the synchronizing to disk. See
   Section 4.2, “What to Do If MySQL Keeps Crashing”.

·  --init-file=file_name

   Read SQL statements from this file at startup. Each statement must be on a
   single line and should not include comments.

·  --innodb-safe-binlog

   Adds consistency guarantees between the content of InnoDB tables and the
   binary log. See Section 10.3, “The Binary Log”. This option was removed in
   MySQL 5.0.3, having been made obsolete by the introduction of XA
   transaction support.

·  --innodb-xxx

   The InnoDB options are listed in Section 2.4, “InnoDB Startup Options and
   System Variables”.

·  --language=lang_name, -L lang_name

   Return client error messages in the given language.	lang_name can be given
   as the language name or as the full pathname to the directory where the
   language files are installed. See Section 9.2, “Setting the Error Message
   Language”.

·  --large-pages

   Some hardware/operating system architectures support memory pages greater
   than the default (usually 4KB). The actual implementation of this support
   depends on the underlying hardware and OS. Applications that perform a lot
   of memory accesses may obtain performance improvements by using large pages
   due to reduced Translation Lookaside Buffer (TLB) misses.

   Currently, MySQL supports only the Linux implementation of large pages
   support (which is called HugeTLB in Linux). We have plans to extend this
   support to FreeBSD, Solaris and possibly other platforms.

   Before large pages can be used on Linux, it is necessary to configure the
   HugeTLB memory pool. For reference, consult the hugetlbpage.txt file in the
   Linux kernel source.

   This option is disabled by default. It was added in MySQL 5.0.3.

·  --log[=file_name], -l [file_name]

   Log connections and SQL statements received from clients to this file. See
   Section 10.2, “The General Query Log”. If you omit the filename, MySQL uses
   host_name.log as the filename.

·  --log-bin[=base_name]

   Enable binary logging. The server logs all statements that change data to
   the binary log, which is used for backup and replication. See Section 10.3,
   “The Binary Log”.

   The option value, if given, is the basename for the log sequence. The
   server creates binary log files in sequence by adding a numeric suffix to
   the basename. It is recommended that you specify a basename (see
   Section 8.1, “Open Issues in MySQL”, for the reason). Otherwise, MySQL uses
   host_name-bin as the basename.

·  --log-bin-index[=file_name]

   The index file for binary log filenames. See Section 10.3, “The Binary
   Log”. If you omit the filename, and if you didn't specify one with
   --log-bin, MySQL uses host_name-bin.index as the filename.

·  --log-bin-trust-function-creators[={0|1}]

   With no argument or an argument of 1, this option sets the
   log_bin_trust_function_creators system variable to 1. With an argument of
   0, this option sets the system variable to 0.
   log_bin_trust_function_creators affects how MySQL enforces restrictions on
   stored function creation. See Section 4, “Binary Logging of Stored Routines
   and Triggers”.

   This option was added in MySQL 5.0.16.

·  --log-bin-trust-routine-creators[={0|1}]

   This is the old name for --log-bin-trust-function-creators. Before MySQL
   5.0.16, it also applies to stored procedures, not just stored functions and
   sets the log_bin_trust_routine_creators system variable. As of 5.0.16, this
   option is deprecated. It is recognized for backward compatibility but its
   use results in a warning.

   This option was added in MySQL 5.0.6.

·  --log-error[=file_name]

   Log errors and startup messages to this file. See Section 10.1, “The Error
   Log”. If you omit the filename, MySQL uses host_name.err. If the filename
   has no extension, the server adds an extension of .err.

·  --log-isam[=file_name]

   Log all MyISAM changes to this file (used only when debugging MyISAM).

·  --log-long-format (DEPRECATED)

   Log extra information to the update log, binary update log, and slow query
   log, if they have been activated. For example, the username and timestamp
   are logged for all queries. This option is deprecated, as it now represents
   the default logging behavior. (See the description for --log-short-format.)
   The --log-queries-not-using-indexes option is available for the purpose of
   logging queries that do not use indexes to the slow query log.

·  --log-queries-not-using-indexes

   If you are using this option with --log-slow-queries, queries that do not
   use indexes are logged to the slow query log. See Section 10.4, “The Slow
   Query Log”.

·  --log-short-format

   Log less information to the update log, binary update log, and slow query
   log, if they have been activated. For example, the username and timestamp
   are not logged for queries.

·  --log-slow-admin-statements

   Log slow administrative statements such as OPTIMIZE TABLE, ANALYZE TABLE,
   and ALTER TABLE to the slow query log.

·  --log-slow-queries[=file_name]

   Log all queries that have taken more than long_query_time seconds to
   execute to this file. See Section 10.4, “The Slow Query Log”. See the
   descriptions of the --log-long-format and --log-short-format options for
   details.

·  --log-tc=file_name

   The name of the memory-mapped transaction coordinator log file (for XA
   transactions that affect multiple storage engines when the binary log is
   disabled). The default name is tc.log. The file is created under the data
   directory if not given as a full pathname. Currently, this option is
   unused. Added in MySQL 5.0.3.

·  --log-tc-size=size

   The size in bytes of the memory-mapped transaction coordinator log. The
   default size is 24KB. Added in MySQL 5.0.3.

·  --log-warnings[=level], -W [level]

   Print out warnings such as Aborted connection...  to the error log.
   Enabling this option is recommended, for example, if you use replication
   (you get more information about what is happening, such as messages about
   network failures and reconnections). This option is enabled (1) by default,
   and the default level value if omitted is 1. To disable this option, use
   --log-warnings=0. Aborted connections are not logged to the error log
   unless the value is greater than 1. See Section 2.10, “Communication Errors
   and Aborted Connections”.

·  --low-priority-updates

   Give table-modifying operations (INSERT, REPLACE, DELETE, UPDATE) lower
   priority than selects. This can also be done via {INSERT | REPLACE | DELETE
   | UPDATE} LOW_PRIORITY ...  to lower the priority of only one query, or by
   SET LOW_PRIORITY_UPDATES=1 to change the priority in one thread. See
   Section 3.2, “Table Locking Issues”.

·  --memlock

   Lock the mysqld process in memory. This works on systems such as Solaris
   that support the mlockall() system call. This might help if you have a
   problem where the operating system is causing mysqld to swap on disk. Note
   that use of this option requires that you run the server as root, which is
   normally not a good idea for security reasons. See Section 5.5, “How to Run
   MySQL as a Normal User”.

·  --myisam-recover[=option[,option]...]]

   Set the MyISAM storage engine recovery mode. The option value is any
   combination of the values of DEFAULT, BACKUP, FORCE, or QUICK. If you
   specify multiple values, separate them by commas. You can also use a value
   of "" to disable this option. If this option is used, each time mysqld
   opens a MyISAM table, it checks whether the table is marked as crashed or
   wasn't closed properly. (The last option works only if you are running with
   external locking disabled.) If this is the case, mysqld runs a check on the
   table. If the table was corrupted, mysqld attempts to repair it.

   The following options affect how the repair works:

   ┌────────┬──────────────────────────────────────────────┐
   │Option  │ Description				   │
   ├────────┼──────────────────────────────────────────────┤
   │DEFAULT │ The same as not giving any		   │
   │	    │ option to					   │
   │	    │ --myisam-recover.				   │
   ├────────┼──────────────────────────────────────────────┤
   │BACKUP  │ If the data file was			   │
   │	    │ changed during recovery,			   │
   │	    │ save a backup of the			   │
   │	    │			    tbl_name.MYD	   │
   │	    │			    file		   │
   │	    │ as					   │
   │	    │			    tbl_name-datetime.BAK. │
   ├────────┼──────────────────────────────────────────────┤
   │FORCE   │ Run recovery even if we would lose more than │
   │	    │ one row from the				   │
   │	    │			    .MYD file.		   │
   ├────────┼──────────────────────────────────────────────┤
   │QUICK   │ Don't check the rows in the table if there   │
   │	    │ aren't any delete blocks.			   │
   └────────┴──────────────────────────────────────────────┘
   Before the server automatically repairs a table, it writes a note about the
   repair to the error log. If you want to be able to recover from most
   problems without user intervention, you should use the options
   BACKUP,FORCE. This forces a repair of a table even if some rows would be
   deleted, but it keeps the old data file as a backup so that you can later
   examine what happened.

   See Section 1.1, “MyISAM Startup Options”.

·  --ndb-connectstring=connect_string

   When using the NDB storage engine, it is possible to point out the
   management server that distributes the cluster configuration by setting the
   connect string option. See Section 4.4.2, “The Cluster connectstring”, for
   syntax.

·  --ndbcluster

   If the binary includes support for the NDB Cluster storage engine, this
   option enables the engine, which is disabled by default. See Chapter 15,
   MySQL Cluster.

·  --old-passwords

   Force the server to generate short (pre-4.1) password hashes for new
   passwords. This is useful for compatibility when the server must support
   older client programs. See Section 6.9, “Password Hashing as of MySQL 4.1”.

·  --one-thread

   Only use one thread (for debugging under Linux). This option is available
   only if the server is built with debugging enabled. See Section 1,
   “Debugging a MySQL Server”.

·  --open-files-limit=count

   Change the number of file descriptors available to mysqld. If this option
   is not set or is set to 0, mysqld uses the value to reserve file
   descriptors with setrlimit(). If the value is 0, mysqld reserves
   max_connections×5 or max_connections + table_open_cache×2 files (whichever
   is larger). You should try increasing this value if mysqld gives you the
   error Too many open files.

·  --pid-file=path

   The pathname of the process ID file. This file is used by other programs
   such as mysqld_safe to determine the server's process ID.

·  --port=port_num, -P port_num

   The port number to use when listening for TCP/IP connections. The port
   number must be 1024 or higher unless the server is started by the root
   system user.

·  --port-open-timeout=num

   On some systems, when the server is stopped, the TCP/IP port might not
   become available immediately. If the server is restarted quickly afterward,
   its attempt to reopen the port can fail. This option indicates how many
   seconds the server should wait for the TCP/IP port to become free if it
   cannot be opened. The default is not to wait. This option was added in
   MySQL 5.0.19.

·  --safe-mode

   Skip some optimization stages.

·  --safe-show-database (DEPRECATED)

   See Section 6.3, “Privileges Provided by MySQL”.

·  --safe-user-create

   If this option is enabled, a user cannot create new MySQL users by using
   the GRANT statement, if the user doesn't have the INSERT privilege for the
   mysql.user table or any column in the table.

·  --secure-auth

   Disallow authentication by clients that attempt to use accounts that have
   old (pre-4.1) passwords.

·  --shared-memory

   Enable shared-memory connections by local clients. This option is available
   only on Windows.

·  --shared-memory-base-name=name

   The name of shared memory to use for shared-memory connections. This option
   is available only on Windows. The default name is MYSQL. The name is case
   sensitive.

·  --skip-bdb

   Disable the BDB storage engine. This saves memory and might speed up some
   operations. Do not use this option if you require BDB tables.

·  --skip-concurrent-insert

   Turn off the ability to select and insert at the same time on MyISAM
   tables. (This is to be used only if you think you have found a bug in this
   feature.) See Section 3.3, “Concurrent Inserts”.

·  --skip-external-locking

   Do not use external locking (system locking). With external locking
   disabled, you must shut down the server to use myisamchk. (See Section 5.1,
   “System Factors and Startup Parameter Tuning”.) To avoid this requirement,
   use the CHECK TABLE and REPAIR TABLE statements to check and repair MyISAM
   tables.

   External locking has been disabled by default since MySQL 4.0.

·  --skip-grant-tables

   This option causes the server not to use the privilege system at all, which
   gives anyone with access to the server unrestricted access to all
   databases. You can cause a running server to start using the grant tables
   again by executing mysqladmin flush-privileges or mysqladmin reload command
   from a system shell, or by issuing a MySQL FLUSH PRIVILEGES statement after
   connecting to the server. This option also suppresses loading of
   user-defined functions (UDFs).

·  --skip-host-cache

   Do not use the internal hostname cache for faster name-to-IP resolution.
   Instead, query the DNS server every time a client connects. See
   Section 5.6, “How MySQL Uses DNS”.

·  --skip-innodb

   Disable the InnoDB storage engine. This saves memory and disk space and
   might speed up some operations. Do not use this option if you require
   InnoDB tables.

·  --skip-merge

   Disable the MERGE storage engine. This option was added in MySQL 5.0.24. It
   can be used if the following behavior is undesirable: If a user has access
   to MyISAM table t, that user can create a MERGE table m that accesses t.
   However, if the user's privileges on t are subsequently revoked, the user
   can continue to access t by doing so through m.

·  --skip-name-resolve

   Do not resolve hostnames when checking client connections. Use only IP
   numbers. If you use this option, all Host column values in the grant tables
   must be IP numbers or localhost. See Section 5.6, “How MySQL Uses DNS”.

·  --skip-ndbcluster

   Disable the NDB Cluster storage engine. This is the default for binaries
   that were built with NDB Cluster storage engine support; the server
   allocates memory and other resources for this storage engine only if the
   --ndbcluster option is given explicitly. See Section 4.3, “Quick Test Setup
   of MySQL Cluster”, for an example of usage.

·  --skip-networking

   Don't listen for TCP/IP connections at all. All interaction with mysqld
   must be made via named pipes or shared memory (on Windows) or Unix socket
   files (on Unix). This option is highly recommended for systems where only
   local clients are allowed. See Section 5.6, “How MySQL Uses DNS”.

·  --ssl*

   Options that begin with --ssl specify whether to allow clients to connect
   via SSL and indicate where to find SSL keys and certificates. See
   Section 7.7.3, “SSL Command Options”.

·  --standalone

   Available on Windows NT-based systems only; instructs the MySQL server not
   to run as a service.

·  --symbolic-links, --skip-symbolic-links

   Enable or disable symbolic link support. This option has different effects
   on Windows and Unix:

   ·  On Windows, enabling symbolic links allows you to establish a symbolic
      link to a database directory by creating a db_name.sym file that
      contains the path to the real directory. See Section 6.1.3, “Using
      Symbolic Links for Databases on Windows”.

   ·  On Unix, enabling symbolic links means that you can link a MyISAM index
      file or data file to another directory with the INDEX DIRECTORY or DATA
      DIRECTORY options of the CREATE TABLE statement. If you delete or rename
      the table, the files that its symbolic links point to also are deleted
      or renamed. See Section 6.1.2, “Using Symbolic Links for Tables on
      Unix”.

·  --skip-safemalloc

   If MySQL is configured with --with-debug=full, all MySQL programs check for
   memory overruns during each memory allocation and memory freeing operation.
   This checking is very slow, so for the server you can avoid it when you
   don't need it by using the --skip-safemalloc option.

·  --skip-show-database

   With this option, the SHOW DATABASES statement is allowed only to users who
   have the SHOW DATABASES privilege, and the statement displays all database
   names. Without this option, SHOW DATABASES is allowed to all users, but
   displays each database name only if the user has the SHOW DATABASES
   privilege or some privilege for the database. Note that any global
   privilege is considered a privilege for the database.

·  --skip-stack-trace

   Don't write stack traces. This option is useful when you are running mysqld
   under a debugger. On some systems, you also must use this option to get a
   core file. See Section 1, “Debugging a MySQL Server”.

·  --skip-thread-priority

   Disable using thread priorities for faster response time.

·  --socket=path

   On Unix, this option specifies the Unix socket file to use when listening
   for local connections. The default value is /tmp/mysql.sock. On Windows,
   the option specifies the pipe name to use when listening for local
   connections that use a named pipe. The default value is MySQL (not case
   sensitive).

·  --sql-mode=value[,value[,value...]]

   Set the SQL mode. See the section called “SQL MODES”.

·  --sysdate-is-now

   As of MySQL 5.0.13, SYSDATE() by default returns the time at which it
   executes, not the time at which the statement in which it occurs begins
   executing. This differs from the behavior of NOW(). This option causes
   SYSDATE() to be an alias for NOW(). For information about the implications
   for binary logging and replication, see the description for SYSDATE() in
   Section 5, “Date and Time Functions” and for SET TIMESTAMP in Section 5.3,
   “SET Syntax”.

   This option was added in MySQL 5.0.20.

·  --tc-heuristic-recover={COMMIT|ROLLBACK}

   The type of decision to use in the heuristic recovery process. Currently,
   this option is unused. Added in MySQL 5.0.3.

·  --temp-pool

   This option causes most temporary files created by the server to use a
   small set of names, rather than a unique name for each new file. This works
   around a problem in the Linux kernel dealing with creating many new files
   with different names. With the old behavior, Linux seems to “leak” memory,
   because it is being allocated to the directory entry cache rather than to
   the disk cache.

·  --transaction-isolation=level

   Sets the default transaction isolation level. The level value can be
   READ-UNCOMMITTED, READ-COMMITTED, REPEATABLE-READ, or SERIALIZABLE. See
   Section 4.6, “SET TRANSACTION Syntax”.

·  --tmpdir=path, -t path

   The path of the directory to use for creating temporary files. It might be
   useful if your default /tmp directory resides on a partition that is too
   small to hold temporary tables. This option accepts several paths that are
   used in round-robin fashion. Paths should be separated by colon characters
   (‘:’) on Unix and semicolon characters (‘;’) on Windows, NetWare, and OS/2.
   If the MySQL server is acting as a replication slave, you should not set
   --tmpdir to point to a directory on a memory-based filesystem or to a
   directory that is cleared when the server host restarts. For more
   information about the storage location of temporary files, see Section 4.4,
   “Where MySQL Stores Temporary Files”. A replication slave needs some of its
   temporary files to survive a machine restart so that it can replicate
   temporary tables or LOAD DATA INFILE operations. If files in the temporary
   file directory are lost when the server restarts, replication fails.

·  --user={user_name|user_id}, -u {user_name|user_id}

   Run the mysqld server as the user having the name user_name or the numeric
   user ID user_id. (“User” in this context refers to a system login account,
   not a MySQL user listed in the grant tables.)

   This option is mandatory when starting mysqld as root. The server changes
   its user ID during its startup sequence, causing it to run as that
   particular user rather than as root. See Section 5.1, “General Security
   Guidelines”.

   To avoid a possible security hole where a user adds a --user=root option to
   a my.cnf file (thus causing the server to run as root), mysqld uses only
   the first --user option specified and produces a warning if there are
   multiple --user options. Options in /etc/my.cnf and $MYSQL_HOME/my.cnf are
   processed before command-line options, so it is recommended that you put a
   --user option in /etc/my.cnf and specify a value other than root. The
   option in /etc/my.cnf is found before any other --user options, which
   ensures that the server runs as a user other than root, and that a warning
   results if any other --user option is found.

·  --version, -V

   Display version information and exit.

You can assign a value to a server system variable by using an option of the
form --var_name=value. For example, --key_buffer_size=32M sets the
key_buffer_size variable to a value of 32MB.

Note that when you assign a value to a variable, MySQL might automatically
correct the value to stay within a given range, or adjust the value to the
closest allowable value if only certain values are allowed.

If you want to restrict the maximum value to which a variable can be set at
runtime with SET, you can define this by using the --maximum-var_name=value
command-line option.

It is also possible to set variables by using --set-variable=var_name=value or
-O var_name=value syntax.  This syntax is deprecated.

You can change the values of most system variables for a running server with
the SET statement. See Section 5.3, “SET Syntax”.

the section called “SYSTEM VARIABLES”, provides a full description for all
variables, and additional information for setting them at server startup and
runtime.  Section 5.2, “Tuning Server Parameters”, includes information on
optimizing the server by tuning system variables.

SYSTEM VARIABLES
       The mysql server maintains many system variables that indicate how it
       is configured. Each system variable has a default value. System
       variables can be set at server startup using options on the command
       line or in an option file. Most of them can be changed dynamically
       while the server is running by means of the SET statement, which
       enables you to modify operation of the server without having to stop
       and restart it. You can refer to system variable values in expressions.

       There are several ways to see the names and values of system variables:

       ·  To see the values that a server will use based on its compiled-in
	  defaults and any option files that it reads, use this command:

	  mysqld --verbose --help

       ·  To see the values that a server will use based on its compiled-in
	  defaults, ignoring the settings in any option files, use this
	  command:

	  mysqld --no-defaults --verbose --help

       ·  To see the current values used by a running server, use the SHOW
	  VARIABLES statement.

       This section provides a description of each system variable. Variables
       with no version indicated are present in all MySQL 5.0 releases. For
       historical information concerning their implementation, please see
       MySQL 3.23, 4.0, 4.1 Reference Manual.

       For additional system variable information, see these sections:

       ·  the section called “USING SYSTEM VARIABLES”, discusses the syntax
	  for setting and displaying system variable values.

       ·  the section called “Dynamic System Variables”, lists the variables
	  that can be set at runtime.

       ·  Information on tuning sytem variables can be found in Section 5.2,
	  “Tuning Server Parameters”.

       ·  Section 2.4, “InnoDB Startup Options and System Variables”, lists
	  InnoDB system variables.

       Note: Some of the following variable descriptions refer to “enabling”
       or “disabling” a variable. These variables can be enabled with the SET
       statement by setting them to ON or 1, or disabled by setting them to
       OFF or 0. However, to set such a variable on the command line or in an
       option file, you must set it to 1 or 0; setting it to ON or OFF will
       not work. For example, on the command line, --delay_key_write=1 works
       but --delay_key_write=ON does not.

       Values for buffer sizes, lengths, and stack sizes are given in bytes
       unless otherwise specified.

       ·  auto_increment_increment

	  auto_increment_increment and auto_increment_offset are intended for
	  use with master-to-master replication, and can be used to control
	  the operation of AUTO_INCREMENT columns. Both variables can be set
	  globally or locally, and each can assume an integer value between 1
	  and 65,535 inclusive. Setting the value of either of these two
	  variables to 0 causes its value to be set to 1 instead. Attempting
	  to set the value of either of these two variables to an integer
	  greater than 65,535 or less than 0 causes its value to be set to
	  65,535 instead. Attempting to set the value of
	  auto_increment_increment or auto_increment_offset to a non-integer
	  value gives rise to an error, and the actual value of the variable
	  remains unchanged.

	  These two variables affect AUTO_INCREMENT column behavior as
	  follows:

	  ·  auto_increment_increment controls the interval between successive
	     column values. For example:

	     mysql> SHOW VARIABLES LIKE 'auto_inc%';
	     +--------------------------+-------+
	     | Variable_name		| Value |
	     +--------------------------+-------+
	     | auto_increment_increment | 1	|
	     | auto_increment_offset	| 1	|
	     +--------------------------+-------+
	     2 rows in set (0.00 sec)
	     mysql> CREATE TABLE autoinc1
		 -> (col INT NOT NULL AUTO_INCREMENT PRIMARY KEY);
	       Query OK, 0 rows affected (0.04 sec)
	     mysql> SET @@auto_increment_increment=10;
	     Query OK, 0 rows affected (0.00 sec)
	     mysql> SHOW VARIABLES LIKE 'auto_inc%';
	     +--------------------------+-------+
	     | Variable_name		| Value |
	     +--------------------------+-------+
	     | auto_increment_increment | 10	|
	     | auto_increment_offset	| 1	|
	     +--------------------------+-------+
	     2 rows in set (0.01 sec)
	     mysql> INSERT INTO autoinc1 VALUES (NULL), (NULL), (NULL), (NULL);
	     Query OK, 4 rows affected (0.00 sec)
	     Records: 4	 Duplicates: 0	Warnings: 0
	     mysql> SELECT col FROM autoinc1;
	     +-----+
	     | col |
	     +-----+
	     |	 1 |
	     |	11 |
	     |	21 |
	     |	31 |
	     +-----+
	     4 rows in set (0.00 sec)
	  (Note how SHOW VARIABLES is used here to obtain the current values
	  for these variables.)

	  ·  auto_increment_offset determines the starting point for the
	     AUTO_INCREMENT column value. Consider the following, assuming
	     that these statements are executed during the same session as the
	     example given in the description for auto_increment_increment:

	     mysql> SET @@auto_increment_offset=5;
	     Query OK, 0 rows affected (0.00 sec)
	     mysql> SHOW VARIABLES LIKE 'auto_inc%';
	     +--------------------------+-------+
	     | Variable_name		| Value |
	     +--------------------------+-------+
	     | auto_increment_increment | 10	|
	     | auto_increment_offset	| 5	|
	     +--------------------------+-------+
	     2 rows in set (0.00 sec)
	     mysql> CREATE TABLE autoinc2
		 -> (col INT NOT NULL AUTO_INCREMENT PRIMARY KEY);
	     Query OK, 0 rows affected (0.06 sec)
	     mysql> INSERT INTO autoinc2 VALUES (NULL), (NULL), (NULL), (NULL);
	     Query OK, 4 rows affected (0.00 sec)
	     Records: 4	 Duplicates: 0	Warnings: 0
	     mysql> SELECT col FROM autoinc2;
	     +-----+
	     | col |
	     +-----+
	     |	 5 |
	     |	15 |
	     |	25 |
	     |	35 |
	     +-----+
	     4 rows in set (0.02 sec)
	  If the value of auto_increment_offset is greater than that of
	  auto_increment_increment, the value of auto_increment_offset is
	  ignored.

	  Should one or both of these variables be changed and then new rows
	  inserted into a table containing an AUTO_INCREMENT column, the
	  results may seem counterintuitive because the series of
	  AUTO_INCREMENT values is calculated without regard to any values
	  already present in the column, and the next value inserted is the
	  least value in the series that is greater than the maximum existing
	  value in the AUTO_INCREMENT column. In other words, the series is
	  calculated like so:

	  auto_increment_offset + N × auto_increment_increment

	  where N is a positive integer value in the series [1, 2, 3, ...].
	  For example:

	  mysql> SHOW VARIABLES LIKE 'auto_inc%';
	  +--------------------------+-------+
	  | Variable_name	     | Value |
	  +--------------------------+-------+
	  | auto_increment_increment | 10    |
	  | auto_increment_offset    | 5     |
	  +--------------------------+-------+
	  2 rows in set (0.00 sec)
	  mysql> SELECT col FROM autoinc1;
	  +-----+
	  | col |
	  +-----+
	  |   1 |
	  |  11 |
	  |  21 |
	  |  31 |
	  +-----+
	  4 rows in set (0.00 sec)
	  mysql> INSERT INTO autoinc1 VALUES (NULL), (NULL), (NULL), (NULL);
	  Query OK, 4 rows affected (0.00 sec)
	  Records: 4  Duplicates: 0  Warnings: 0
	  mysql> SELECT col FROM autoinc1;
	  +-----+
	  | col |
	  +-----+
	  |   1 |
	  |  11 |
	  |  21 |
	  |  31 |
	  |  35 |
	  |  45 |
	  |  55 |
	  |  65 |
	  +-----+
	  8 rows in set (0.00 sec)
       The values shown for auto_increment_increment and auto_increment_offset
       generate the series 5 + N × 10, that is, [5, 15, 25, 35, 45, ...]. The
       greatest value present in the col column prior to the INSERT is 31, and
       the next available value in the AUTO_INCREMENT series is 35, so the
       inserted values for col begin at that point and the results are as
       shown for the SELECT query.

       It is important to remember that it is not possible to confine the
       effects of these two variables to a single table, and thus they do not
       take the place of the sequences offered by some other database
       management systems; these variables control the behavior of all
       AUTO_INCREMENT columns in all tables on the MySQL server. If one of
       these variables is set globally, its effects persist until the global
       value is changed or overridden by setting them locally, or until mysqld
       is restarted. If set locally, the new value affects AUTO_INCREMENT
       columns for all tables into which new rows are inserted by the current
       user for the duration of the session, unless the values are changed
       during that session.

       The auto_increment_increment variable was added in MySQL 5.0.2. Its
       default value is 1. See Section 13, “Auto-Increment in Multiple-Master
       Replication”.

       ·  auto_increment_offset

	  This variable was introduced in MySQL 5.0.2. Its default value is 1.
	  For particulars, see the description for auto_increment_increment.

       ·  back_log

	  The number of outstanding connection requests MySQL can have. This
	  comes into play when the main MySQL thread gets very many connection
	  requests in a very short time. It then takes some time (although
	  very little) for the main thread to check the connection and start a
	  new thread. The back_log value indicates how many requests can be
	  stacked during this short time before MySQL momentarily stops
	  answering new requests. You need to increase this only if you expect
	  a large number of connections in a short period of time.

	  In other words, this value is the size of the listen queue for
	  incoming TCP/IP connections. Your operating system has its own limit
	  on the size of this queue. The manual page for the Unix listen()
	  system call should have more details. Check your OS documentation
	  for the maximum value for this variable.  back_log cannot be set
	  higher than your operating system limit.

       ·  basedir

	  The MySQL installation base directory. This variable can be set with
	  the --basedir option.

       ·  bdb_cache_size

	  The size of the buffer that is allocated for caching indexes and
	  rows for BDB tables. If you don't use BDB tables, you should start
	  mysqld with --skip-bdb to not allocate memory for this cache.

       ·  bdb_home

	  The base directory for BDB tables. This should be assigned the same
	  value as the datadir variable.

       ·  bdb_log_buffer_size

	  The size of the buffer that is allocated for caching indexes and
	  rows for BDB tables. If you don't use BDB tables, you should set
	  this to 0 or start mysqld with --skip-bdb to not allocate memory for
	  this cache.

       ·  bdb_logdir

	  The directory where the BDB storage engine writes its log files.
	  This variable can be set with the --bdb-logdir option.

       ·  bdb_max_lock

	  The maximum number of locks that can be active for a BDB table
	  (10,000 by default). You should increase this value if errors such
	  as the following occur when you perform long transactions or when
	  mysqld has to examine many rows to calculate a query:

	  bdb: Lock table is out of available locks
	  Got error 12 from ...

       ·  bdb_shared_data

	  This is ON if you are using --bdb-shared-data to start Berkeley DB
	  in multi-process mode. (Do not use DB_PRIVATE when initializing
	  Berkeley DB.)

       ·  bdb_tmpdir

	  The BDB temporary file directory.

       ·  binlog_cache_size

	  The size of the cache to hold the SQL statements for the binary log
	  during a transaction. A binary log cache is allocated for each
	  client if the server supports any transactional storage engines and
	  if the server has the binary log enabled (--log-bin option). If you
	  often use large, multiple-statement transactions, you can increase
	  this cache size to get more performance. The Binlog_cache_use and
	  Binlog_cache_disk_use status variables can be useful for tuning the
	  size of this variable. See Section 10.3, “The Binary Log”.

       ·  bulk_insert_buffer_size

	  MyISAM uses a special tree-like cache to make bulk inserts faster
	  for INSERT ... SELECT, INSERT ... VALUES (...), (...), ..., and LOAD
	  DATA INFILE when adding data to non-empty tables. This variable
	  limits the size of the cache tree in bytes per thread. Setting it to
	  0 disables this optimization. The default value is 8MB.

       ·  character_set_client

	  The character set for statements that arrive from the client.

       ·  character_set_connection

	  The character set used for literals that do not have a character set
	  introducer and for number-to-string conversion.

       ·  character_set_database

	  The character set used by the default database. The server sets this
	  variable whenever the default database changes. If there is no
	  default database, the variable has the same value as
	  character_set_server.

       ·  character_set_filesystem

	  The filesystem character set. This variable is used to interpret
	  string literals that refer to filenames, such as in the LOAD DATA
	  INFILE and SELECT ... INTO OUTFILE statements and the LOAD_FILE()
	  function. Such filenames are converted from character_set_client to
	  character_set_filesystem before the file opening attempt occurs. The
	  default value is binary, which means that no conversion occurs. For
	  systems on which multi-byte filenames are allowed, a different value
	  may be more appropriate. For example, if the system represents
	  filenames using UTF-8, set character_set_filesytem to ´utf8'. This
	  variable was added in MySQL 5.0.19.

       ·  character_set_results

	  The character set used for returning query results to the client.

       ·  character_set_server

	  The server's default character set.

       ·  character_set_system

	  The character set used by the server for storing identifiers. The
	  value is always utf8.

       ·  character_sets_dir

	  The directory where character sets are installed.

       ·  collation_connection

	  The collation of the connection character set.

       ·  collation_database

	  The collation used by the default database. The server sets this
	  variable whenever the default database changes. If there is no
	  default database, the variable has the same value as
	  collation_server.

       ·  collation_server

	  The server's default collation.

       ·  completion_type

	  The transaction completion type:

	  ·  If the value is 0 (the default), COMMIT and ROLLBACK are
	     unaffected.

	  ·  If the value is 1, COMMIT and ROLLBACK are equivalent to COMMIT
	     AND CHAIN and ROLLBACK AND CHAIN, respectively. (A new
	     transaction starts immediately with the same isolation level as
	     the just-terminated transaction.)

	  ·  If the value is 2, COMMIT and ROLLBACK are equivalent to COMMIT
	     RELEASE and ROLLBACK RELEASE, respectively. (The server
	     disconnects after terminating the transaction.)

	  This variable was added in MySQL 5.0.3

       ·  concurrent_insert

	  If ON (the default), MySQL allows INSERT and SELECT statements to
	  run concurrently for MyISAM tables that have no free blocks in the
	  middle. You can turn this option off by starting mysqld with --safe
	  or --skip-new.

	  In MySQL 5.0.6, this variable was changed to take three integer
	  values:

	  ┌──────┬─────────────────────────────┐
	  │Value │ Description		       │
	  ├──────┼─────────────────────────────┤
	  │0	 │ Off			       │
	  ├──────┼─────────────────────────────┤
	  │1	 │ (Default) Enables	       │
	  │	 │ concurrent insert for       │
	  │	 │ MyISAM tables	       │
	  │	 │			 that  │
	  │	 │ don't have holes	       │
	  ├──────┼─────────────────────────────┤
	  │2	 │ Enables concurrent inserts  │
	  │	 │ for all MyISAM tables. If   │
	  │	 │			 table │
	  │	 │ has a hole and is in use    │
	  │	 │ by another thread	       │
	  │	 │			 the   │
	  │	 │ new row will be inserted    │
	  │	 │ at end of table. If	       │
	  │	 │			 table │
	  │	 │ is not in use, MySQL does   │
	  │	 │ a normal read lock	       │
	  │	 │			 and   │
	  │	 │ inserts the new row into    │
	  │	 │ the hole.		       │
	  └──────┴─────────────────────────────┘
	  See also Section 3.3, “Concurrent Inserts”.

       ·  connect_timeout

	  The number of seconds that the mysqld server waits for a connect
	  packet before responding with Bad handshake.

       ·  datadir

	  The MySQL data directory. This variable can be set with the
	  --datadir option.

       ·  date_format

	  This variable is not implemented.

       ·  datetime_format

	  This variable is not implemented.

       ·  default_week_format

	  The default mode value to use for the WEEK() function. See
	  Section 5, “Date and Time Functions”.

       ·  delay_key_write

	  This option applies only to MyISAM tables. It can have one of the
	  following values to affect handling of the DELAY_KEY_WRITE table
	  option that can be used in CREATE TABLE statements.

	  ┌───────┬───────────────────────────────────────┐
	  │Option │ Description				  │
	  ├───────┼───────────────────────────────────────┤
	  │OFF	  │ DELAY_KEY_WRITE is			  │
	  │	  │ ignored.				  │
	  ├───────┼───────────────────────────────────────┤
	  │ON	  │ MySQL honors any			  │
	  │	  │ DELAY_KEY_WRITE option		  │
	  │	  │ specified in			  │
	  │	  │			  CREATE	  │
	  │	  │ TABLE statements. This		  │
	  │	  │			  is		  │
	  │	  │ the default value.			  │
	  ├───────┼───────────────────────────────────────┤
	  │ALL	  │ All new opened tables are		  │
	  │	  │ treated as if they were		  │
	  │	  │ created with the			  │
	  │	  │			  DELAY_KEY_WRITE │
	  │	  │ option enabled.			  │
	  └───────┴───────────────────────────────────────┘
	  If DELAY_KEY_WRITE is enabled for a table, the key buffer is not
	  flushed for the table on every index update, but only when the table
	  is closed. This speeds up writes on keys a lot, but if you use this
	  feature, you should add automatic checking of all MyISAM tables by
	  starting the server with the --myisam-recover option (for example,
	  --myisam-recover=BACKUP,FORCE). See the section called “COMMAND
	  OPTIONS”, and Section 1.1, “MyISAM Startup Options”.

	  Note that enabling external locking with --external-locking offers
	  no protection against index corruption for tables that use delayed
	  key writes.

       ·  delayed_insert_limit

	  After inserting delayed_insert_limit delayed rows, the INSERT
	  DELAYED handler thread checks whether there are any SELECT
	  statements pending. If so, it allows them to execute before
	  continuing to insert delayed rows.

       ·  delayed_insert_timeout

	  How many seconds an INSERT DELAYED handler thread should wait for
	  INSERT statements before terminating.

       ·  delayed_queue_size

	  This is a per-table limit on the number of rows to queue when
	  handling INSERT DELAYED statements. If the queue becomes full, any
	  client that issues an INSERT DELAYED statement waits until there is
	  room in the queue again.

       ·  div_precision_increment

	  This variable indicates the number of digits of precision by which
	  to increase the result of division operations performed with the /
	  operator. The default value is 4. The minimum and maximum values are
	  0 and 30, respectively. The following example illustrates the effect
	  of increasing the default value.

	  mysql> SELECT 1/7;
	  +--------+
	  | 1/7	   |
	  +--------+
	  | 0.1429 |
	  +--------+
	  mysql> SET div_precision_increment = 12;
	  mysql> SELECT 1/7;
	  +----------------+
	  | 1/7		   |
	  +----------------+
	  | 0.142857142857 |
	  +----------------+
       This variable was added in MySQL 5.0.6.

       ·  engine_condition_pushdown

	  This variable applies to NDB. By default it is 0 (OFF): If you
	  execute a query such as SELECT * FROM t WHERE mycol = 42, where
	  mycol is a non-indexed column, the query is executed as a full table
	  scan on every NDB node. Each node sends every row to the MySQL
	  server, which applies the WHERE condition. If
	  engine_condition_pushdown is set to 1 (ON), the condition is “pushed
	  down” to the storage engine and sent to the NDB nodes. Each node
	  uses the condition to perform the scan, and only sends back to the
	  MySQL server the rows that match the condition.

	  This variable was added in MySQL 5.0.3. Before that, the default NDB
	  behavior is the same as for a value of OFF.

       ·  expire_logs_days

	  The number of days for automatic binary log removal. The default is
	  0, which means “no automatic removal.”  Possible removals happen at
	  startup and at binary log rotation.

       ·  flush

	  If ON, the server flushes (synchronizes) all changes to disk after
	  each SQL statement. Normally, MySQL does a write of all changes to
	  disk only after each SQL statement and lets the operating system
	  handle the synchronizing to disk. See Section 4.2, “What to Do If
	  MySQL Keeps Crashing”. This variable is set to ON if you start
	  mysqld with the --flush option.

       ·  flush_time

	  If this is set to a non-zero value, all tables are closed every
	  flush_time seconds to free up resources and synchronize unflushed
	  data to disk. We recommend that this option be used only on Windows
	  9x or Me, or on systems with minimal resources.

       ·  ft_boolean_syntax

	  The list of operators supported by boolean full-text searches
	  performed using IN BOOLEAN MODE. See Section 7.1, “Boolean Full-Text
	  Searches”.

	  The default variable value is ´+ -><()~*:""&|'. The rules for
	  changing the value are as follows:

	  ·  Operator function is determined by position within the string.

	  ·  The replacement value must be 14 characters.

	  ·  Each character must be an ASCII non-alphanumeric character.

	  ·  Either the first or second character must be a space.

	  ·  No duplicates are allowed except the phrase quoting operators in
	     positions 11 and 12. These two characters are not required to be
	     the same, but they are the only two that may be.

	  ·  Positions 10, 13, and 14 (which by default are set to ‘:’, ‘&’,
	     and ‘|’) are reserved for future extensions.

       ·  ft_max_word_len

	  The maximum length of the word to be included in a FULLTEXT index.

	  Note: FULLTEXT indexes must be rebuilt after changing this variable.
	  Use REPAIR TABLE tbl_name QUICK.

       ·  ft_min_word_len

	  The minimum length of the word to be included in a FULLTEXT index.

	  Note: FULLTEXT indexes must be rebuilt after changing this variable.
	  Use REPAIR TABLE tbl_name QUICK.

       ·  ft_query_expansion_limit

	  The number of top matches to use for full-text searches performed
	  using WITH QUERY EXPANSION.

       ·  ft_stopword_file

	  The file from which to read the list of stopwords for full-text
	  searches. All the words from the file are used; comments are not
	  honored. By default, a built-in list of stopwords is used (as
	  defined in the myisam/ft_static.c file). Setting this variable to
	  the empty string ('') disables stopword filtering.

	  Note: FULLTEXT indexes must be rebuilt after changing this variable
	  or the contents of the stopword file. Use REPAIR TABLE tbl_name
	  QUICK.

       ·  group_concat_max_len

	  The maximum allowed result length for the GROUP_CONCAT() function.
	  The default is 1024.

       ·  have_archive

	  YES if mysqld supports ARCHIVE tables, NO if not.

       ·  have_bdb

	  YES if mysqld supports BDB tables.  DISABLED if --skip-bdb is used.

       ·  have_blackhole_engine

	  YES if mysqld supports BLACKHOLE tables, NO if not.

       ·  have_compress

	  YES if the zlib compression library is available to the server, NO
	  if not. If not, the COMPRESS() and UNCOMPRESS() functions cannot be
	  used.

       ·  have_crypt

	  YES if the crypt() system call is available to the server, NO if
	  not. If not, the ENCRYPT() function cannot be used.

       ·  have_csv

	  YES if mysqld supports ARCHIVE tables, NO if not.

       ·  have_example_engine

	  YES if mysqld supports EXAMPLE tables, NO if not.

	  have_federated_engine

	  YES if mysqld supports FEDERATED tables, NO if not. This variable
	  was added in MySQL 5.0.3.

       ·  have_geometry

	  YES if the server supports spatial data types, NO if not.

       ·  have_innodb

	  YES if mysqld supports InnoDB tables.	 DISABLED if --skip-innodb is
	  used.

       ·  have_isam

	  In MySQL 5.0, this variable appears only for reasons of backward
	  compatibility. It is always NO because ISAM tables are no longer
	  supported.

       ·  have_ndbcluster

	  YES if mysqld supports NDB Cluster tables.  DISABLED if
	  --skip-ndbcluster is used.

       ·  have_openssl

	  YES if mysqld supports SSL connections, NO if not.

       ·  have_query_cache

	  YES if mysqld supports the query cache, NO if not.

       ·  have_raid

	  In MySQL 5.0, this variable appears only for reasons of backward
	  compatibility. It is always NO because RAID tables are no longer
	  supported.

       ·  have_rtree_keys

	  YES if RTREE indexes are available, NO if not. (These are used for
	  spatial indexes in MyISAM tables.)

       ·  have_symlink

	  YES if symbolic link support is enabled, NO if not. This is required
	  on Unix for support of the DATA DIRECTORY and INDEX DIRECTORY table
	  options, and on Windows for support of data directory symlinks.

       ·  init_connect

	  A string to be executed by the server for each client that connects.
	  The string consists of one or more SQL statements. To specify
	  multiple statements, separate them by semicolon characters. For
	  example, each client begins by default with autocommit mode enabled.
	  There is no global system variable to specify that autocommit should
	  be disabled by default, but init_connect can be used to achieve the
	  same effect:

	  SET GLOBAL init_connect='SET AUTOCOMMIT=0';
       This variable can also be set on the command line or in an option file.
       To set the variable as just shown using an option file, include these
       lines:

	  [mysqld]
	  init_connect='SET AUTOCOMMIT=0'
       Note that the content of init_connect is not executed for users that
       have the SUPER privilege. This is done so that an erroneous value for
       init_connect does not prevent all clients from connecting. For example,
       the value might contain a statement that has a syntax error, thus
       causing client connections to fail. Not executing init_connect for
       users that have the SUPER privilege enables them to open a connection
       and fix the init_connect value.

       ·  init_file

	  The name of the file specified with the --init-file option when you
	  start the server. This should be a file containing SQL statements
	  that you want the server to execute when it starts. Each statement
	  must be on a single line and should not include comments.

       ·  init_slave

	  This variable is similar to init_connect, but is a string to be
	  executed by a slave server each time the SQL thread starts. The
	  format of the string is the same as for the init_connect variable.

       ·  innodb_xxx

	  InnoDB system variables are listed in Section 2.4, “InnoDB Startup
	  Options and System Variables”.

       ·  interactive_timeout

	  The number of seconds the server waits for activity on an
	  interactive connection before closing it. An interactive client is
	  defined as a client that uses the CLIENT_INTERACTIVE option to
	  mysql_real_connect(). See also wait_timeout.

       ·  join_buffer_size

	  The size of the buffer that is used for joins that do not use
	  indexes and thus perform full table scans. Normally, the best way to
	  get fast joins is to add indexes. Increase the value of
	  join_buffer_size to get a faster full join when adding indexes is
	  not possible. One join buffer is allocated for each full join
	  between two tables. For a complex join between several tables for
	  which indexes are not used, multiple join buffers might be
	  necessary.

       ·  key_buffer_size

	  Index blocks for MyISAM tables are buffered and are shared by all
	  threads.  key_buffer_size is the size of the buffer used for index
	  blocks. The key buffer is also known as the key cache.

	  The maximum allowable setting for key_buffer_size is 4GB. The
	  effective maximum size might be less, depending on your available
	  physical RAM and per-process RAM limits imposed by your operating
	  system or hardware platform.

	  Increase the value to get better index handling (for all reads and
	  multiple writes) to as much as you can afford. Using a value that is
	  25% of total memory on a machine that mainly runs MySQL is quite
	  common. However, if you make the value too large (for example, more
	  than 50% of your total memory) your system might start to page and
	  become extremely slow. MySQL relies on the operating system to
	  perform filesystem caching for data reads, so you must leave some
	  room for the filesystem cache. Consider also the memory requirements
	  of other storage engines.

	  For even more speed when writing many rows at the same time, use
	  LOCK TABLES. See Section 2.16, “Speed of INSERT Statements”.

	  You can check the performance of the key buffer by issuing a SHOW
	  STATUS statement and examining the Key_read_requests, Key_reads,
	  Key_write_requests, and Key_writes status variables. (See
	  Section 5.4, “SHOW Syntax”.) The Key_reads/Key_read_requests ratio
	  should normally be less than 0.01. The Key_writes/Key_write_requests
	  ratio is usually near 1 if you are using mostly updates and deletes,
	  but might be much smaller if you tend to do updates that affect many
	  rows at the same time or if you are using the DELAY_KEY_WRITE table
	  option.

	  The fraction of the key buffer in use can be determined using
	  key_buffer_size in conjunction with the Key_blocks_unused status
	  variable and the buffer block size, which is available from the
	  key_cache_block_size system variable:

	  1 - ((Key_blocks_unused × key_cache_block_size) / key_buffer_size)
       This value is an approximation because some space in the key buffer may
       be allocated internally for administrative structures.

       It is possible to create multiple MyISAM key caches. The size limit of
       4GB applies to each cache individually, not as a group. See
       Section 4.6, “The MyISAM Key Cache”.

       ·  key_cache_age_threshold

	  This value controls the demotion of buffers from the hot sub-chain
	  of a key cache to the warm sub-chain. Lower values cause demotion to
	  happen more quickly. The minimum value is 100. The default value is
	  300. See Section 4.6, “The MyISAM Key Cache”.

       ·  key_cache_block_size

	  The size in bytes of blocks in the key cache. The default value is
	  1024. See Section 4.6, “The MyISAM Key Cache”.

       ·  key_cache_division_limit

	  The division point between the hot and warm sub-chains of the key
	  cache buffer chain. The value is the percentage of the buffer chain
	  to use for the warm sub-chain. Allowable values range from 1 to 100.
	  The default value is 100. See Section 4.6, “The MyISAM Key Cache”.

       ·  language

	  The language used for error messages.

       ·  large_file_support

	  Whether mysqld was compiled with options for large file support.

       ·  large_pages

	  Whether large page support is enabled. This variable was added in
	  MySQL 5.0.3.

       ·  lc_time_names

	  This variable specifies the locale that controls the language used
	  to display day and month names and abbreviations. This variable
	  affects the output from the DATE_FORMAT(), DAYNAME() and MONTHNAME()
	  functions. Locale names are POSIX-style values such as ´ja_JP' or
	  ´pt_BR'. The default value is ´en_US' regardless of your system's
	  locale setting. For further information, see Section 9.9, “MySQL
	  Server Locale Support”. This variable was added in MySQL 5.0.25.

       ·  license

	  The type of license the server has.

       ·  local_infile

	  Whether LOCAL is supported for LOAD DATA INFILE statements. See
	  Section 5.4, “Security Issues with LOAD DATA LOCAL”.

       ·  locked_in_memory

	  Whether mysqld was locked in memory with --memlock.

       ·  log

	  Whether logging of all statements to the general query log is
	  enabled. See Section 10.2, “The General Query Log”.

       ·  log_bin

	  Whether the binary log is enabled. See Section 10.3, “The Binary
	  Log”.

       ·  log_bin_trust_function_creators

	  This variable applies when binary logging is enabled. It controls
	  whether stored function creators can be trusted not to create stored
	  functions that will cause unsafe events to be written to the binary
	  log. If set to 0 (the default), users are not allowed to create or
	  alter stored functions unless they have the SUPER privilege in
	  addition to the CREATE ROUTINE or ALTER ROUTINE privilege. A setting
	  of 0 also enforces the restriction that a function must be declared
	  with the DETERMINISTIC characteristic, or with the READS SQL DATA or
	  NO SQL characteristic. If the variable is set to 1, MySQL does not
	  enforce these restrictions on stored function creation. See
	  Section 4, “Binary Logging of Stored Routines and Triggers”.

	  This variable was added in MySQL 5.0.16.

       ·  log_bin_trust_routine_creators

	  This is the old name for log_bin_trust_function_creators. Before
	  MySQL 5.0.16, it also applies to stored procedures, not just stored
	  functions. As of 5.0.16, this variable is deprecated. It is
	  recognized for backward compatibility but its use results in a
	  warning.

	  This variable was added in MySQL 5.0.6.

       ·  log_error

	  The location of the error log.

       ·  log_queries_not_using_indexes

	  Whether queries that do not use indexes are logged to the slow query
	  log. See Section 10.4, “The Slow Query Log”. This variable was added
	  in MySQL 5.0.23.

       ·  log_slave_updates

	  Whether updates received by a slave server from a master server
	  should be logged to the slave's own binary log. Binary logging must
	  be enabled on the slave for this variable to have any effect. See
	  Section 8, “Replication Startup Options”.

       ·  log_slow_queries

	  Whether slow queries should be logged.  “Slow” is determined by the
	  value of the long_query_time variable. See Section 10.4, “The Slow
	  Query Log”.

       ·  log_warnings

	  Whether to produce additional warning messages. It is enabled (1) by
	  default and can be disabled by setting it to 0. Aborted connections
	  are not logged to the error log unless the value is greater than 1.

       ·  long_query_time

	  If a query takes longer than this many seconds, the server
	  increments the Slow_queries status variable. If you are using the
	  --log-slow-queries option, the query is logged to the slow query log
	  file. This value is measured in real time, not CPU time, so a query
	  that is under the threshold on a lightly loaded system might be
	  above the threshold on a heavily loaded one. The minimum value is 1.
	  The default is 10. See Section 10.4, “The Slow Query Log”.

       ·  low_priority_updates

	  If set to 1, all INSERT, UPDATE, DELETE, and LOCK TABLE WRITE
	  statements wait until there is no pending SELECT or LOCK TABLE READ
	  on the affected table. This variable previously was named
	  sql_low_priority_updates.

       ·  lower_case_file_system

	  This variable describes the case sensitivity of filenames on the
	  filesystem where the data directory is located.  OFF means filenames
	  are case sensitive, ON means they are not case sensitive.

       ·  lower_case_table_names

	  If set to 1, table names are stored in lowercase on disk and table
	  name comparisons are not case sensitive. If set to 2 table names are
	  stored as given but compared in lowercase. This option also applies
	  to database names and table aliases. See Section 2.2, “Identifier
	  Case Sensitivity”.

	  If you are using InnoDB tables, you should set this variable to 1 on
	  all platforms to force names to be converted to lowercase.

	  You should not set this variable to 0 if you are running MySQL on a
	  system that does not have case-sensitive filenames (such as Windows
	  or Mac OS X). If this variable is not set at startup and the
	  filesystem on which the data directory is located does not have
	  case-sensitive filenames, MySQL automatically sets
	  lower_case_table_names to 2.

       ·  max_allowed_packet

	  The maximum size of one packet or any generated/intermediate string.

	  The packet message buffer is initialized to net_buffer_length bytes,
	  but can grow up to max_allowed_packet bytes when needed. This value
	  by default is small, to catch large (possibly incorrect) packets.

	  You must increase this value if you are using large BLOB columns or
	  long strings. It should be as big as the largest BLOB you want to
	  use. The protocol limit for max_allowed_packet is 1GB.

       ·  max_binlog_cache_size

	  If a multiple-statement transaction requires more than this many
	  bytes of memory, the server generates a Multi-statement transaction
	  required more than 'max_binlog_cache_size' bytes of storage error.
	  The minimum value is 4096, the maximum and default values are 4GB.

       ·  max_binlog_size

	  If a write to the binary log causes the current log file size to
	  exceed the value of this variable, the server rotates the binary
	  logs (closes the current file and opens the next one). You cannot
	  set this variable to more than 1GB or to less than 4096 bytes. The
	  default value is 1GB.

	  A transaction is written in one chunk to the binary log, so it is
	  never split between several binary logs. Therefore, if you have big
	  transactions, you might see binary logs larger than max_binlog_size.

	  If max_relay_log_size is 0, the value of max_binlog_size applies to
	  relay logs as well.

       ·  max_connect_errors

	  If there are more than this number of interrupted connections from a
	  host, that host is blocked from further connections. You can unblock
	  blocked hosts with the FLUSH HOSTS statement.

       ·  max_connections

	  The number of simultaneous client connections allowed. By default,
	  this is 100. See Section 2.6, “Too many connections”, for more
	  information.

	  Increasing this value increases the number of file descriptors that
	  mysqld requires. See Section 4.8, “How MySQL Opens and Closes
	  Tables”, for comments on file descriptor limits.

       ·  max_delayed_threads

	  Do not start more than this number of threads to handle INSERT
	  DELAYED statements. If you try to insert data into a new table after
	  all INSERT DELAYED threads are in use, the row is inserted as if the
	  DELAYED attribute wasn't specified. If you set this to 0, MySQL
	  never creates a thread to handle DELAYED rows; in effect, this
	  disables DELAYED entirely.

       ·  max_error_count

	  The maximum number of error, warning, and note messages to be stored
	  for display by the SHOW ERRORS and SHOW WARNINGS statements.

       ·  max_heap_table_size

	  This variable sets the maximum size to which MEMORY tables are
	  allowed to grow. The value of the variable is used to calculate
	  MEMORY table MAX_ROWS values. Setting this variable has no effect on
	  any existing MEMORY table, unless the table is re-created with a
	  statement such as CREATE TABLE or altered with ALTER TABLE or
	  TRUNCATE TABLE.

       ·  max_insert_delayed_threads

	  This variable is a synonym for max_delayed_threads.

       ·  max_join_size

	  Do not allow SELECT statements that probably need to examine more
	  than max_join_size rows (for single-table statements) or row
	  combinations (for multiple-table statements) or that are likely to
	  do more than max_join_size disk seeks. By setting this value, you
	  can catch SELECT statements where keys are not used properly and
	  that would probably take a long time. Set it if your users tend to
	  perform joins that lack a WHERE clause, that take a long time, or
	  that return millions of rows.

	  Setting this variable to a value other than DEFAULT resets the value
	  of SQL_BIG_SELECTS to 0. If you set the SQL_BIG_SELECTS value again,
	  the max_join_size variable is ignored.

	  If a query result is in the query cache, no result size check is
	  performed, because the result has previously been computed and it
	  does not burden the server to send it to the client.

	  This variable previously was named sql_max_join_size.

       ·  max_length_for_sort_data

	  The cutoff on the size of index values that determines which
	  filesort algorithm to use. See Section 2.12, “ORDER BY
	  Optimization”.

       ·  max_prepared_stmt_count

	  This variable limits the total number of prepared statements in the
	  server. It can be used in environments where there is the potential
	  for denial-of-service attacks based on running the server out of
	  memory by preparing huge numbers of statements. The default value is
	  16,382. The allowable range of values is from 0 to 1 million. If the
	  value is set lower than the current number of prepared statements,
	  existing statements are not affected and can be used, but no new
	  statements can be prepared until the current number drops below the
	  limit. This variable was added in MySQL 5.0.21.

       ·  max_relay_log_size

	  If a write by a replication slave to its relay log causes the
	  current log file size to exceed the value of this variable, the
	  slave rotates the relay logs (closes the current file and opens the
	  next one). If max_relay_log_size is 0, the server uses
	  max_binlog_size for both the binary log and the relay log. If
	  max_relay_log_size is greater than 0, it constrains the size of the
	  relay log, which enables you to have different sizes for the two
	  logs. You must set max_relay_log_size to between 4096 bytes and 1GB
	  (inclusive), or to 0. The default value is 0. See Section 3,
	  “Replication Implementation Details”.

       ·  max_seeks_for_key

	  Limit the assumed maximum number of seeks when looking up rows based
	  on a key. The MySQL optimizer assumes that no more than this number
	  of key seeks are required when searching for matching rows in a
	  table by scanning an index, regardless of the actual cardinality of
	  the index (see Section 5.4.13, “SHOW INDEX Syntax”). By setting this
	  to a low value (say, 100), you can force MySQL to prefer indexes
	  instead of table scans.

       ·  max_sort_length

	  The number of bytes to use when sorting BLOB or TEXT values. Only
	  the first max_sort_length bytes of each value are used; the rest are
	  ignored.

       ·  max_sp_recursion_depth

	  The number of times that a stored procedure may call itself. The
	  default value for this option is 0, which completely disallows
	  recursion in stored procedures. The maximum value is 255.

	  This variable can be set globally and per session.

       ·  max_tmp_tables

	  The maximum number of temporary tables a client can keep open at the
	  same time. (This option does not yet do anything.)

       ·  max_user_connections

	  The maximum number of simultaneous connections allowed to any given
	  MySQL account. A value of 0 means “no limit.”

	  Before MySQL 5.0.3, this variable has only global scope. Beginning
	  with MySQL 5.0.3, it also has a read-only session scope. The session
	  variable has the same value as the global variable unless the
	  current account has a non-zero MAX_USER_CONNECTIONS resource limit.
	  In that case, the session value reflects the account limit.

       ·  max_write_lock_count

	  After this many write locks, allow some pending read lock requests
	  to be processed in between.

       ·  myisam_data_pointer_size

	  The default pointer size in bytes, to be used by CREATE TABLE for
	  MyISAM tables when no MAX_ROWS option is specified. This variable
	  cannot be less than 2 or larger than 7. The default value is 6 (4
	  before MySQL 5.0.6). This variable was added in MySQL 4.1.2. See
	  Section 2.11, “The table is full”.

       ·  myisam_max_extra_sort_file_size (DEPRECATED)

	  If the temporary file used for fast MyISAM index creation would be
	  larger than using the key cache by the amount specified here, prefer
	  the key cache method. This is mainly used to force long character
	  keys in large tables to use the slower key cache method to create
	  the index. The value is given in bytes.

	  Note: This variable was removed in MySQL 5.0.6.

       ·  myisam_max_sort_file_size

	  The maximum size of the temporary file that MySQL is allowed to use
	  while re-creating a MyISAM index (during REPAIR TABLE, ALTER TABLE,
	  or LOAD DATA INFILE). If the file size would be larger than this
	  value, the index is created using the key cache instead, which is
	  slower. The value is given in bytes.

	  The default value is 2GB. If MyISAM index files exceed this size and
	  disk space is available, increasing the value may help performance.

       ·  myisam_recover_options

	  The value of the --myisam-recover option. See the section called
	  “COMMAND OPTIONS”.

       ·  myisam_repair_threads

	  If this value is greater than 1, MyISAM table indexes are created in
	  parallel (each index in its own thread) during the Repair by sorting
	  process. The default value is 1.

	  Note: Multi-threaded repair is still beta-quality code.

       ·  myisam_sort_buffer_size

	  The size of the buffer that is allocated when sorting MyISAM indexes
	  during a REPAIR TABLE or when creating indexes with CREATE INDEX or
	  ALTER TABLE.

       ·  myisam_stats_method

	  How the server treats NULL values when collecting statistics about
	  the distribution of index values for MyISAM tables. This variable
	  has two possible values, nulls_equal and nulls_unequal. For
	  nulls_equal, all NULL index values are considered equal and form a
	  single value group that has a size equal to the number of NULL
	  values. For nulls_unequal, NULL values are considered unequal, and
	  each NULL forms a distinct value group of size 1.

	  The method that is used for generating table statistics influences
	  how the optimizer chooses indexes for query execution, as described
	  in Section 4.7, “MyISAM Index Statistics Collection”.

	  This variable was added in MySQL 5.0.14. For older versions, the
	  statistics collection method is equivalent to nulls_equal.

       ·  multi_read_range

	  Specifies the maximum number of ranges to send to a storage engine
	  during range selects. The default value is 256. Sending multiple
	  ranges to an engine is a feature that can improve the performance of
	  certain selects dramatically, particularly for NDBCLUSTER. This
	  engine needs to send the range requests to all nodes, and sending
	  many of those requests at once reduces the communication costs
	  significantly. This variable was added in MySQL 5.0.3.

       ·  named_pipe

	  (Windows only.) Indicates whether the server supports connections
	  over named pipes.

       ·  ndb_autoincrement_prefetch_sz

	  Determines the probability of gaps in an autoincremented column. Set
	  to 1 to minimize this. Set to a high value for optimization — makes
	  inserts faster, but decreases the likelihood that consecutive
	  autoincrement numbers will be used in a batch of inserts. Default
	  value: 32. Mimimum value: 1.

       ·  ndb_cache_check_time

	  The number of milliseconds to wait before checking the NDB query
	  cache. Setting this to 0 (the default and minimum value) means that
	  the NDB query cache will be checked for validation on every query.

	  The recommended maximum value for this variable is 1000, which means
	  that the query cache is checked once per second. A larger value
	  means the NDB query cache is less often checked and invalidated due
	  to updates on a different mysqld. It is generally not desirable to
	  set this to a value greater than 2000.

       ·  ndb_force_send

	  Forces sending of buffers to NDB immediately, without waiting for
	  other threads. Defaults to ON.

       ·  ndb_index_stat_cache_entries

	  Sets the granularity of the statistics by determining the number of
	  starting and ending keys to store in the statistics memory cache.
	  Zero means no caching takes place; in this case, the data nodes are
	  always queries directly. Default value: 32.

       ·  ndb_index_stat_enable

	  Use NDB index statistics in query optimization. Defaults to ON.

       ·  ndb_index_stat_update_freq

	  How often to query data nodes instead of the statistics cache. For
	  example, a value of 20 (the default) means to direct every 20th
	  query to the data nodes.

       ·  ndb_report_thresh_binlog_epoch_slip

	  This is a threshold on the number of epochs to be behind before
	  reporting binlog status. For example, a value of 3 (the default)
	  means that if the difference between which epoch has been received
	  from the storage nodes and which epoch has been applied to the
	  binlog is 3 or more, a status message will be sent to the cluster
	  log.

       ·  ndb_report_thresh_binlog_mem_usage

	  This is a threshold on the percentage of free memory remaining
	  before reporting binlog status. For example, a value of 10 (the
	  default) means that if the amount of available memory for receiving
	  binlog data from the data nodes falls below 10%, a status message
	  will be sent to the cluster log.

       ·  ndb_use_exact_count

	  Forces NDB to use a count of records during SELECT COUNT(*) query
	  planning to speed up this type of query. The default value is ON.
	  For faster queries overall, disable this feature by setting the
	  value of ndb_use_exact_count to OFF.

       ·  ndb_use_transactions

	  You can disable NDB transaction support by setting this variable's
	  values to OFF (not recommended). The default is ON.

       ·  net_buffer_length

	  Each client thread is associated with a connection buffer and result
	  buffer. Both begin with a size given by net_buffer_length but are
	  dynamically enlarged up to max_allowed_packet bytes as needed. The
	  result buffer shrinks to net_buffer_length after each SQL statement.

	  This variable should not normally be changed, but if you have very
	  little memory, you can set it to the expected length of statements
	  sent by clients. If statements exceed this length, the connection
	  buffer is automatically enlarged. The maximum value to which
	  net_buffer_length can be set is 1MB.

       ·  net_read_timeout

	  The number of seconds to wait for more data from a connection before
	  aborting the read. This timeout applies only to TCP/IP connections,
	  not to connections made via Unix socket files, named pipes, or
	  shared memory. When the server is reading from the client,
	  net_read_timeout is the timeout value controlling when to abort.
	  When the server is writing to the client, net_write_timeout is the
	  timeout value controlling when to abort. See also slave_net_timeout.

       ·  net_retry_count

	  If a read on a communication port is interrupted, retry this many
	  times before giving up. This value should be set quite high on
	  FreeBSD because internal interrupts are sent to all threads.

       ·  net_write_timeout

	  The number of seconds to wait for a block to be written to a
	  connection before aborting the write. This timeout applies only to
	  TCP/IP connections, not to connections made via Unix socket files,
	  named pipes, or shared memory. See also net_read_timeout.

       ·  new

	  This variable was used in MySQL 4.0 to turn on some 4.1 behaviors,
	  and is retained for backward compatibility. In MySQL 5.0, its value
	  is always OFF.

       ·  old_passwords

	  Whether the server should use pre-4.1-style passwords for MySQL user
	  accounts. See Section 2.3, “Client does not support authentication
	  protocol”.

       ·  one_shot

	  This is not a variable, but it can be used when setting some
	  variables. It is described in Section 5.3, “SET Syntax”.

       ·  open_files_limit

	  The number of files that the operating system allows mysqld to open.
	  This is the real value allowed by the system and might be different
	  from the value you gave using the --open-files-limit option to
	  mysqld or mysqld_safe. The value is 0 on systems where MySQL can't
	  change the number of open files.

       ·  optimizer_prune_level

	  Controls the heuristics applied during query optimization to prune
	  less-promising partial plans from the optimizer search space. A
	  value of 0 disables heuristics so that the optimizer performs an
	  exhaustive search. A value of 1 causes the optimizer to prune plans
	  based on the number of rows retrieved by intermediate plans. This
	  variable was added in MySQL 5.0.1.

       ·  optimizer_search_depth

	  The maximum depth of search performed by the query optimizer. Values
	  larger than the number of relations in a query result in better
	  query plans, but take longer to generate an execution plan for a
	  query. Values smaller than the number of relations in a query return
	  an execution plan quicker, but the resulting plan may be far from
	  being optimal. If set to 0, the system automatically picks a
	  reasonable value. If set to the maximum number of tables used in a
	  query plus 2, the optimizer switches to the algorithm used in MySQL
	  5.0.0 (and previous versions) for performing searches. This variable
	  was added in MySQL 5.0.1.

       ·  pid_file

	  The pathname of the process ID (PID) file. This variable can be set
	  with the --pid-file option.

       ·  port

	  The number of the port on which the server listens for TCP/IP
	  connections. This variable can be set with the --port option.

       ·  preload_buffer_size

	  The size of the buffer that is allocated when preloading indexes.

       ·  prepared_stmt_count

	  The current number of prepared statements. (The maximum number of
	  statements is given by the max_prepared_stmt_count system variable.)
	  This variable was added in MySQL 5.0.21.

       ·  protocol_version

	  The version of the client/server protocol used by the MySQL server.

       ·  query_alloc_block_size

	  The allocation size of memory blocks that are allocated for objects
	  created during statement parsing and execution. If you have problems
	  with memory fragmentation, it might help to increase this a bit.

       ·  query_cache_limit

	  Don't cache results that are larger than this number of bytes. The
	  default value is 1MB.

       ·  query_cache_min_res_unit

	  The minimum size (in bytes) for blocks allocated by the query cache.
	  The default value is 4096 (4KB). Tuning information for this
	  variable is given in Section 12.3, “Query Cache Configuration”.

       ·  query_cache_size

	  The amount of memory allocated for caching query results. The
	  default value is 0, which disables the query cache. The allowable
	  values are multiples of 1024; other values are rounded down to the
	  nearest multiple. Note that query_cache_size bytes of memory are
	  allocated even if query_cache_type is set to 0. See Section 12.3,
	  “Query Cache Configuration”, for more information.

       ·  query_cache_type

	  Set the query cache type. Setting the GLOBAL value sets the type for
	  all clients that connect thereafter. Individual clients can set the
	  SESSION value to affect their own use of the query cache. Possible
	  values are shown in the following table:

	  ┌────────────┬────────────────────────────────────────┐
	  │Option      │ Description				│
	  ├────────────┼────────────────────────────────────────┤
	  │0 or OFF    │ Don't cache results in or		│
	  │	       │ retrieve results from the		│
	  │	       │ query cache. Note			│
	  │	       │		       that		│
	  │	       │ this does not deallocate		│
	  │	       │ the query cache			│
	  │	       │		       buffer.		│
	  │	       │ To do that, you should set		│
	  │	       │		       query_cache_size │
	  │	       │ to 0.					│
	  ├────────────┼────────────────────────────────────────┤
	  │1 or ON     │ Cache all query results except for	│
	  │	       │ those that begin with SELECT		│
	  │	       │		       SQL_NO_CACHE.	│
	  ├────────────┼────────────────────────────────────────┤
	  │2 or DEMAND │ Cache results only for queries that	│
	  │	       │ begin with SELECT			│
	  │	       │		       SQL_CACHE.	│
	  └────────────┴────────────────────────────────────────┘
	  This variable defaults to ON.

       ·  query_cache_wlock_invalidate

	  Normally, when one client acquires a WRITE lock on a MyISAM table,
	  other clients are not blocked from issuing statements that read from
	  the table if the query results are present in the query cache.
	  Setting this variable to 1 causes acquisition of a WRITE lock for a
	  table to invalidate any queries in the query cache that refer to the
	  table. This forces other clients that attempt to access the table to
	  wait while the lock is in effect.

       ·  query_prealloc_size

	  The size of the persistent buffer used for statement parsing and
	  execution. This buffer is not freed between statements. If you are
	  running complex queries, a larger query_prealloc_size value might be
	  helpful in improving performance, because it can reduce the need for
	  the server to perform memory allocation during query execution
	  operations.

       ·  range_alloc_block_size

	  The size of blocks that are allocated when doing range optimization.

       ·  read_buffer_size

	  Each thread that does a sequential scan allocates a buffer of this
	  size (in bytes) for each table it scans. If you do many sequential
	  scans, you might want to increase this value, which defaults to
	  131072.

       ·  read_only

	  When the variable is set to ON for a replication slave server, it
	  causes the slave to allow no updates except from slave threads or
	  from users that have the SUPER privilege. This can be useful to
	  ensure that a slave server accepts updates only from its master
	  server and not from clients. As of MySQL 5.0.16, this variable does
	  not apply to TEMPORARY tables.

       ·  read_rnd_buffer_size

	  When reading rows in sorted order following a key-sorting operation,
	  the rows are read through this buffer to avoid disk seeks. Setting
	  the variable to a large value can improve ORDER BY performance by a
	  lot. However, this is a buffer allocated for each client, so you
	  should not set the global variable to a large value. Instead, change
	  the session variable only from within those clients that need to run
	  large queries.

       ·  relay_log_purge

	  Disables or enables automatic purging of relay log files as soon as
	  they are not needed any more. The default value is 1 (ON).

       ·  rpl_recovery_rank

	  This variable is unused.

       ·  secure_auth

	  If the MySQL server has been started with the --secure-auth option,
	  it blocks connections from all accounts that have passwords stored
	  in the old (pre-4.1) format. In that case, the value of this
	  variable is ON, otherwise it is OFF.

	  You should enable this option if you want to prevent all use of
	  passwords employing the old format (and hence insecure communication
	  over the network).

	  Server startup fails with an error if this option is enabled and the
	  privilege tables are in pre-4.1 format. See Section 2.3, “Client
	  does not support authentication protocol”.

       ·  server_id

	  The server ID. This value is set by the --server-id option. It is
	  used for replication to enable master and slave servers to identify
	  themselves uniquely.

       ·  shared_memory

	  (Windows only.) Whether the server allows shared-memory connections.

       ·  shared_memory_base_name

	  (Windows only.) The name of shared memory to use for shared-memory
	  connections. This is useful when running multiple MySQL instances on
	  a single physical machine. The default name is MYSQL. The name is
	  case sensitive.

       ·  skip_external_locking

	  This is OFF if mysqld uses external locking, ON if external locking
	  is disabled.

       ·  skip_networking

	  This is ON if the server allows only local (non-TCP/IP) connections.
	  On Unix, local connections use a Unix socket file. On Windows, local
	  connections use a named pipe or shared memory. On NetWare, only
	  TCP/IP connections are supported, so do not set this variable to ON.
	  This variable can be set to ON with the --skip-networking option.

       ·  skip_show_database

	  This prevents people from using the SHOW DATABASES statement if they
	  do not have the SHOW DATABASES privilege. This can improve security
	  if you have concerns about users being able to see databases
	  belonging to other users. Its effect depends on the SHOW DATABASES
	  privilege: If the variable value is ON, the SHOW DATABASES statement
	  is allowed only to users who have the SHOW DATABASES privilege, and
	  the statement displays all database names. If the value is OFF, SHOW
	  DATABASES is allowed to all users, but displays the names of only
	  those databases for which the user has the SHOW DATABASES or other
	  privilege.

       ·  slave_compressed_protocol

	  Whether to use compression of the slave/master protocol if both the
	  slave and the master support it.

       ·  slave_load_tmpdir

	  The name of the directory where the slave creates temporary files
	  for replicating LOAD DATA INFILE statements.

       ·  slave_net_timeout

	  The number of seconds to wait for more data from a master/slave
	  connection before aborting the read. This timeout applies only to
	  TCP/IP connections, not to connections made via Unix socket files,
	  named pipes, or shared memory.

       ·  slave_skip_errors

	  The replication errors that the slave should skip (ignore).

       ·  slave_transaction_retries

	  If a replication slave SQL thread fails to execute a transaction
	  because of an InnoDB deadlock or exceeded InnoDB's
	  innodb_lock_wait_timeout or NDBCluster's
	  TransactionDeadlockDetectionTimeout or TransactionInactiveTimeout,
	  it automatically retries slave_transaction_retries times before
	  stopping with an error. The default priot to MySQL 4.0.3 is 0. You
	  must explicitly set the value greater than 0 to enable the “retry”
	  behavior, which is probably a good idea. In MySQL 5.0.3 or newer,
	  the default is 10.

       ·  slow_launch_time

	  If creating a thread takes longer than this many seconds, the server
	  increments the Slow_launch_threads status variable.

       ·  socket

	  On Unix platforms, this variable is the name of the socket file that
	  is used for local client connections. The default is
	  /tmp/mysql.sock. (For some distribution formats, the directory might
	  be different, such as /var/lib/mysql for RPMs.)

	  On Windows, this variable is the name of the named pipe that is used
	  for local client connections. The default value is MySQL (not case
	  sensitive).

       ·  sort_buffer_size

	  Each thread that needs to do a sort allocates a buffer of this size.
	  Increase this value for faster ORDER BY or GROUP BY operations. See
	  Section 4.4, “Where MySQL Stores Temporary Files”.

       ·  sql_mode

	  The current server SQL mode, which can be set dynamically. See the
	  section called “SQL MODES”.

       ·  sql_slave_skip_counter

	  The number of events from the master that a slave server should
	  skip. See Section 6.2.6, “SET GLOBAL SQL_SLAVE_SKIP_COUNTER Syntax”.

       ·  ssl_ca

	  The path to a file with a list of trusted SSL CAs. This variable was
	  added in MySQL 5.0.23.

       ·  ssl_capath

	  The path to a directory that contains trusted SSL CA certificates in
	  PEM format. This variable was added in MySQL 5.0.23.

       ·  ssl_cert

	  The name of the SSL certificate file to use for establishing a
	  secure connection. This variable was added in MySQL 5.0.23.

       ·  ssl_cipher

	  A list of allowable ciphers to use for SSL encryption. The cipher
	  list has the same format as the openssl ciphers command. This
	  variable was added in MySQL 5.0.23.

       ·  ssl_key

	  The name of the SSL key file to use for establishing a secure
	  connection. This variable was added in MySQL 5.0.23.

       ·  storage_engine

	  The default storage engine (table type). To set the storage engine
	  at server startup, use the --default-storage-engine option. See the
	  section called “COMMAND OPTIONS”.

       ·  sync_binlog

	  If the value of this variable is positive, the MySQL server
	  synchronizes its binary log to disk (using fdatasync()) after every
	  sync_binlog writes to the binary log. Note that there is one write
	  to the binary log per statement if autocommit is enabled, and one
	  write per transaction otherwise. The default value is 0, which does
	  no synchronizing to disk. A value of 1 is the safest choice, because
	  in the event of a crash you lose at most one statement or
	  transaction from the binary log. However, it is also the slowest
	  choice (unless the disk has a battery-backed cache, which makes
	  synchronization very fast).

	  If the value of sync_binlog is 0 (the default), no extra flushing is
	  done. The server relies on the operating system to flush the file
	  contents occasionaly as for any other file.

       ·  sync_frm

	  If this variable is set to 1, when any non-temporary table is
	  created its .frm file is synchronized to disk (using fdatasync()).
	  This is slower but safer in case of a crash. The default is 1.

       ·  system_time_zone

	  The server system time zone. When the server begins executing, it
	  inherits a time zone setting from the machine defaults, possibly
	  modified by the environment of the account used for running the
	  server or the startup script. The value is used to set
	  system_time_zone. Typically the time zone is specified by the TZ
	  environment variable. It also can be specified using the --timezone
	  option of the mysqld_safe script.

	  The system_time_zone variable differs from time_zone. Although they
	  might have the same value, the latter variable is used to initialize
	  the time zone for each client that connects. See Section 9.8, “MySQL
	  Server Time Zone Support”.

       ·  table_cache

	  The number of open tables for all threads. Increasing this value
	  increases the number of file descriptors that mysqld requires. You
	  can check whether you need to increase the table cache by checking
	  the Opened_tables status variable. See the section called “STATUS
	  VARIABLES”. If the value of Opened_tables is large and you don't do
	  FLUSH TABLES often (which just forces all tables to be closed and
	  reopened), then you should increase the value of the table_cache
	  variable. For more information about the table cache, see
	  Section 4.8, “How MySQL Opens and Closes Tables”.

       ·  table_lock_wait_timeout

	  Specifies a wait timeout for table-level locks, in seconds. The
	  default timeout is 50 seconds. The timeout is active only if the
	  connection has open cursors. This variable can also be set globally
	  at runtime (you need the SUPER privilege to do this). It's available
	  as of MySQL 5.0.10.

       ·  table_type

	  This variable is a synonym for storage_engine. In MySQL 5.0,
	  storage_engine is the preferred name.

       ·  thread_cache_size

	  How many threads the server should cache for reuse. When a client
	  disconnects, the client's threads are put in the cache if there are
	  fewer than thread_cache_size threads there. Requests for threads are
	  satisfied by reusing threads taken from the cache if possible, and
	  only when the cache is empty is a new thread created. This variable
	  can be increased to improve performance if you have a lot of new
	  connections. (Normally, this doesn't provide a notable performance
	  improvement if you have a good thread implementation.) By examining
	  the difference between the Connections and Threads_created status
	  variables, you can see how efficient the thread cache is. For
	  details, see the section called “STATUS VARIABLES”.

       ·  thread_concurrency

	  On Solaris, mysqld calls thr_setconcurrency() with this value. This
	  function enables applications to give the threads system a hint
	  about the desired number of threads that should be run at the same
	  time.

       ·  thread_stack

	  The stack size for each thread. Many of the limits detected by the
	  crash-me test are dependent on this value. The default is large
	  enough for normal operation. See Section 1.4, “The MySQL Benchmark
	  Suite”. The default is 192KB.

       ·  time_format

	  This variable is not implemented.

       ·  time_zone

	  The current time zone. This variable is used to initialize the time
	  zone for each client that connects. By default, the initial value of
	  this is ´SYSTEM' (which means, “use the value of system_time_zone”).
	  The value can be specified explicitly at server startup with the
	  --default-time-zone option. See Section 9.8, “MySQL Server Time Zone
	  Support”.

       ·  timed_mutexes

	  This variable controls whether InnoDB mutexes are timed. If this
	  variable is set to 0 or OFF (the default), mutex timing is disabled.
	  If the variable is set to 1 or ON, mutex timing is enabled. With
	  timing enabled, the os_wait_times value in the output from SHOW
	  ENGINE INNODB MUTEX indicates the amount of time (in ms) spent in
	  operating system waits. Otherwise, the value is 0. This variable was
	  added in MySQL 5.0.3.

       ·  tmp_table_size

	  The maximum size of in-memory temporary tables. (The actual limit is
	  determined as the smaller of max_heap_table_size and
	  tmp_table_size.) If an in-memory temporary table exceeds the limit,
	  MySQL automatically converts it to an on-disk MyISAM table. Increase
	  the value of tmp_table_size (and max_heap_table_size if necessary)
	  if you do many advanced GROUP BY queries and you have lots of
	  memory.

       ·  tmpdir

	  The directory used for temporary files and temporary tables. This
	  variable can be set to a list of several paths that are used in
	  round-robin fashion. Paths should be separated by colon characters
	  (‘:’) on Unix and semicolon characters (‘;’) on Windows, NetWare,
	  and OS/2.

	  The multiple-directory feature can be used to spread the load
	  between several physical disks. If the MySQL server is acting as a
	  replication slave, you should not set tmpdir to point to a directory
	  on a memory-based filesystem or to a directory that is cleared when
	  the server host restarts. A replication slave needs some of its
	  temporary files to survive a machine restart so that it can
	  replicate temporary tables or LOAD DATA INFILE operations. If files
	  in the temporary file directory are lost when the server restarts,
	  replication fails. However, if you are using MySQL 4.0.0 or later,
	  you can set the slave's temporary directory using the
	  slave_load_tmpdir variable. In that case, the slave won't use the
	  general tmpdir value and you can set tmpdir to a non-permanent
	  location.

       ·  transaction_alloc_block_size

	  The amount in bytes by which to increase a per-transaction memory
	  pool which needs memory. See the description of
	  transaction_prealloc_size.

       ·  transaction_prealloc_size

	  There is a per-transaction memory pool from which various
	  transaction-related allocations take memory. The initial size of the
	  pool in bytes is transaction_prealloc_size. For every allocation
	  that cannot be satisfied from the pool because it has insufficient
	  memory available, the pool is increased by
	  transaction_alloc_block_size bytes. When the transaction ends, the
	  pool is truncated to transaction_prealloc_size bytes.

	  By making transaction_prealloc_size sufficiently large to contain
	  all statements within a single transaction, you can avoid many
	  malloc() calls.

       ·  tx_isolation

	  The default transaction isolation level. Defaults to
	  REPEATABLE-READ.

	  This variable is set by the SET TRANSACTION ISOLATION LEVEL
	  statement. See Section 4.6, “SET TRANSACTION Syntax”. If you set
	  tx_isolation directly to an isolation level name that contains a
	  space, the name should be enclosed within quotes, with the space
	  replaced by a dash. For example:

	  SET tx_isolation = 'READ-COMMITTED';

       ·  updatable_views_with_limit

	  This variable controls whether updates to a view can be made when
	  the view does not contain all columns of the primary key defined in
	  the underlying table, if the update statement contains a LIMIT
	  clause. (Such updates often are generated by GUI tools.) An update
	  is an UPDATE or DELETE statement. Primary key here means a PRIMARY
	  KEY, or a UNIQUE index in which no column can contain NULL.

	  The variable can have two values:

	  ·  1 or YES: Issue a warning only (not an error message). This is
	     the default value.

	  ·  0 or NO: Prohibit the update.

	  This variable was added in MySQL 5.0.2.

       ·  version

	  The version number for the server.

	  Starting with MySQL 5.0.24, the version number will also indicate
	  whether the server is a standard release (Community) or Enterprise
	  release (for example, 5.0.28-enterprise-gpl-nt).

       ·  version_bdb

	  The BDB storage engine version.

       ·  version_comment

	  The configure script has a --with-comment option that allows a
	  comment to be specified when building MySQL. This variable contains
	  the value of that comment.

	  For precompiled binaries, this variable will hold the server version
	  and license information. Starting with MySQL 5.0.24, version_comment
	  will include the full server type and license. For community users
	  this will appear as MySQL Community Edition - Standard (GPL). For
	  Enterprise users, the version might be displayed as MySQL Enterprise
	  Server (GPL). The corresponding license for your MySQL binary is
	  shown in parentheses. For server compiled from source, the default
	  value will be the same as that for Community releases.

       ·  version_compile_machine

	  The type of machine or architecture on which MySQL was built.

       ·  version_compile_os

	  The type of operating system on which MySQL was built.

       ·  wait_timeout

	  The number of seconds the server waits for activity on a
	  non-interactive connection before closing it. This timeout applies
	  only to TCP/IP and Unix socket file connections, not to connections
	  made via named pipes, or shared memory.

	  On thread startup, the session wait_timeout value is initialized
	  from the global wait_timeout value or from the global
	  interactive_timeout value, depending on the type of client (as
	  defined by the CLIENT_INTERACTIVE connect option to
	  mysql_real_connect()). See also interactive_timeout.

USING SYSTEM VARIABLES
       The mysql server maintains many system variables that indicate how it
       is configured.  the section called “SYSTEM VARIABLES”, describes the
       meaning of these variables. Each system variable has a default value.
       System variables can be set at server startup using options on the
       command line or in an option file. Most of them can be changed
       dynamically while the server is running by means of the SET statement,
       which enables you to modify operation of the server without having to
       stop and restart it. You can refer to system variable values in
       expressions.

       The server maintains two kinds of system variables. Global variables
       affect the overall operation of the server. Session variables affect
       its operation for individual client connections. A given system
       variable can have both a global and a session value. Global and session
       system variables are related as follows:

       ·  When the server starts, it initializes all global variables to their
	  default values. These defaults can be changed by options specified
	  on the command line or in an option file. (See Section 3,
	  “Specifying Program Options”.)

       ·  The server also maintains a set of session variables for each client
	  that connects. The client's session variables are initialized at
	  connect time using the current values of the corresponding global
	  variables. For example, the client's SQL mode is controlled by the
	  session sql_mode value, which is initialized when the client
	  connects to the value of the global sql_mode value.

       System variable values can be set globally at server startup by using
       options on the command line or in an option file. When you use a
       startup option to set a variable that takes a numeric value, the value
       can be given with a suffix of K, M, or G (either uppercase or
       lowercase) to indicate a multiplier of 1024, 10242 or 10243; that is,
       units of kilobytes, megabytes, or gigabytes, respectively. Thus, the
       following command starts the server with a query cache size of 16
       megabytes and a maximum packet size of one gigabyte:

	  mysqld --query_cache_size=16M --max_allowed_packet=1G

       Within an option file, those variables are set like this:

	  [mysqld]
	  query_cache_size=16M
	  max_allowed_packet=1G

       The lettercase of suffix letters does not matter; 16M and 16m are
       equivalent, as are 1G and 1g.

       If you want to restrict the maximum value to which a system variable
       can be set at runtime with the SET statement, you can specify this
       maximum by using an option of the form --maximum-var_name=value at
       server startup. For example, to prevent the value of query_cache_size
       from being increased to more than 32MB at runtime, use the option
       --maximum-query_cache_size=32M.

       Many system variables are dynamic and can be changed while the server
       runs by using the SET statement. For a list, see the section called
       “Dynamic System Variables”. To change a system variable with SET, refer
       to it as var_name, optionally preceded by a modifier:

       ·  To indicate explicitly that a variable is a global variable, precede
	  its name by GLOBAL or @@global.. The SUPER privilege is required to
	  set global variables.

       ·  To indicate explicitly that a variable is a session variable,
	  precede its name by SESSION, @@session., or @@. Setting a session
	  variable requires no special privilege, but a client can change only
	  its own session variables, not those of any other client.

       ·  LOCAL and @@local.  are synonyms for SESSION and @@session..

       ·  If no modifier is present, SET changes the session variable.

       A SET statement can contain multiple variable assignments, separated by
       commas. If you set several system variables, the most recent GLOBAL or
       SESSION modifier in the statement is used for following variables that
       have no modifier specified.

       Examples:

	  SET sort_buffer_size=10000;
	  SET @@local.sort_buffer_size=10000;
	  SET GLOBAL sort_buffer_size=1000000, SESSION sort_buffer_size=1000000;
	  SET @@sort_buffer_size=1000000;
	  SET @@global.sort_buffer_size=1000000, @@local.sort_buffer_size=1000000;

       When you assign a value to a system variable with SET, you cannot use
       suffix letters in the value (as can be done with startup options).
       However, the value can take the form of an expression:

	  SET sort_buffer_size = 10 * 1024 * 1024;

       The @@var_name syntax for system variables is supported for
       compatibility with some other database systems.

       If you change a session system variable, the value remains in effect
       until your session ends or until you change the variable to a different
       value. The change is not visible to other clients.

       If you change a global system variable, the value is remembered and
       used for new connections until the server restarts. (To make a global
       system variable setting permanent, you should set it in an option
       file.) The change is visible to any client that accesses that global
       variable. However, the change affects the corresponding session
       variable only for clients that connect after the change. The global
       variable change does not affect the session variable for any client
       that is currently connected (not even that of the client that issues
       the SET GLOBAL statement).

       To prevent incorrect usage, MySQL produces an error if you use SET
       GLOBAL with a variable that can only be used with SET SESSION or if you
       do not specify GLOBAL (or @@global.) when setting a global variable.

       To set a SESSION variable to the GLOBAL value or a GLOBAL value to the
       compiled-in MySQL default value, use the DEFAULT keyword. For example,
       the following two statements are identical in setting the session value
       of max_join_size to the global value:

	  SET max_join_size=DEFAULT;
	  SET @@session.max_join_size=@@global.max_join_size;

       Not all system variables can be set to DEFAULT. In such cases, use of
       DEFAULT results in an error.

       You can refer to the values of specific global or sesson system
       variables in expressions by using one of the @@-modifiers. For example,
       you can retrieve values in a SELECT statement like this:

	  SELECT @@global.sql_mode, @@session.sql_mode, @@sql_mode;

       When you refer to a system variable in an expression as @@var_name
       (that is, when you do not specify @@global.  or @@session.), MySQL
       returns the session value if it exists and the global value otherwise.
       (This differs from SET @@var_name = value, which always refers to the
       session value.)

       Note: Some system variables can be enabled with the SET statement by
       setting them to ON or 1, or disabled by setting them to OFF or 0.
       However, to set such a variable on the command line or in an option
       file, you must set it to 1 or 0; setting it to ON or OFF will not work.
       For example, on the command line, --delay_key_write=1 works but
       --delay_key_write=ON does not.

       To display system variable names and values, use the SHOW VARIABLES
       statement:

	  mysql> SHOW VARIABLES;
	  +--------+--------------------------------------------------------------+
	  | Variable_name		    | Value				  |
	  +--------+--------------------------------------------------------------+
	  | auto_increment_increment	    | 1					  |
	  | auto_increment_offset	    | 1					  |
	  | automatic_sp_privileges	    | ON				  |
	  | back_log			    | 50				  |
	  | basedir			    | /					  |
	  | bdb_cache_size		    | 8388600				  |
	  | bdb_home			    | /var/lib/mysql/			  |
	  | bdb_log_buffer_size		    | 32768				  |
	  | bdb_logdir			    |					  |
	  | bdb_max_lock		    | 10000				  |
	  | bdb_shared_data		    | OFF				  |
	  | bdb_tmpdir			    | /tmp/				  |
	  | binlog_cache_size		    | 32768				  |
	  | bulk_insert_buffer_size	    | 8388608				  |
	  | character_set_client	    | latin1				  |
	  | character_set_connection	    | latin1				  |
	  | character_set_database	    | latin1				  |
	  | character_set_results	    | latin1				  |
	  | character_set_server	    | latin1				  |
	  | character_set_system	    | utf8				  |
	  | character_sets_dir		    | /usr/share/mysql/charsets/	  |
	  | collation_connection	    | latin1_swedish_ci			  |
	  | collation_database		    | latin1_swedish_ci			  |
	  | collation_server		    | latin1_swedish_ci			  |
	  | innodb_additional_mem_pool_size | 1048576				  |
	  | innodb_autoextend_increment	    | 8					  |
	  | innodb_buffer_pool_awe_mem_mb   | 0					  |
	  | innodb_buffer_pool_size	    | 8388608				  |
	  | innodb_checksums		    | ON				  |
	  | innodb_commit_concurrency	    | 0					  |
	  | innodb_concurrency_tickets	    | 500				  |
	  | innodb_data_file_path	    | ibdata1:10M:autoextend		  |
	  | innodb_data_home_dir	    |					  |
	  | version			    | 5.0.19-Max			  |
	  | version_comment		    | MySQL Community Edition - Max (GPL) |
	  | version_compile_machine	    | i686				  |
	  | version_compile_os		    | pc-linux-gnu			  |
	  | wait_timeout		    | 28800				  |
	  +--------+--------------------------------------------------------------+

       With a LIKE clause, the statement displays only those variables that
       match the pattern. To obtain a specific variable name, use a LIKE
       clause as shown:

	  SHOW VARIABLES LIKE 'max_join_size';
	  SHOW SESSION VARIABLES LIKE 'max_join_size';

       To get a list of variables whose name match a pattern, use the ‘%’
       wildcard character in a LIKE clause:

	  SHOW VARIABLES LIKE '%size%';
	  SHOW GLOBAL VARIABLES LIKE '%size%';

       Wildcard characters can be used in any position within the pattern to
       be matched. Strictly speaking, because ‘_’ is a wildcard that matches
       any single character, you should escape it as ‘\_’ to match it
       literally. In practice, this is rarely necessary.

       For SHOW VARIABLES, if you specify neither GLOBAL nor SESSION, MySQL
       returns SESSION values.

       The reason for requiring the GLOBAL keyword when setting GLOBAL-only
       variables but not when retrieving them is to prevent problems in the
       future. If we were to remove a SESSION variable that has the same name
       as a GLOBAL variable, a client with the SUPER privilege might
       accidentally change the GLOBAL variable rather than just the SESSION
       variable for its own connection. If we add a SESSION variable with the
       same name as a GLOBAL variable, a client that intends to change the
       GLOBAL variable might find only its own SESSION variable changed.

   Structured System Variables
       A structured variable differs from a regular system variable in two
       respects:

       ·  Its value is a structure with components that specify server
	  parameters considered to be closely related.

       ·  There might be several instances of a given type of structured
	  variable. Each one has a different name and refers to a different
	  resource maintained by the server.

       MySQL 5.0 supports one structured variable type, which specifies
       parameters governing the operation of key caches. A key cache
       structured variable has these components:

       ·  key_buffer_size

       ·  key_cache_block_size

       ·  key_cache_division_limit

       ·  key_cache_age_threshold

       This section describes the syntax for referring to structured
       variables. Key cache variables are used for syntax examples, but
       specific details about how key caches operate are found elsewhere, in
       Section 4.6, “The MyISAM Key Cache”.

       To refer to a component of a structured variable instance, you can use
       a compound name in instance_name.component_name format. Examples:

	  hot_cache.key_buffer_size
	  hot_cache.key_cache_block_size
	  cold_cache.key_cache_block_size

       For each structured system variable, an instance with the name of
       default is always predefined. If you refer to a component of a
       structured variable without any instance name, the default instance is
       used. Thus, default.key_buffer_size and key_buffer_size both refer to
       the same system variable.

       Structured variable instances and components follow these naming rules:

       ·  For a given type of structured variable, each instance must have a
	  name that is unique within variables of that type. However, instance
	  names need not be unique across structured variable types. For
	  example, each structured variable has an instance named default, so
	  default is not unique across variable types.

       ·  The names of the components of each structured variable type must be
	  unique across all system variable names. If this were not true (that
	  is, if two different types of structured variables could share
	  component member names), it would not be clear which default
	  structured variable to use for references to member names that are
	  not qualified by an instance name.

       ·  If a structured variable instance name is not legal as an unquoted
	  identifier, refer to it as a quoted identifier using backticks. For
	  example, hot-cache is not legal, but `hot-cache` is.

       ·  global, session, and local are not legal instance names. This avoids
	  a conflict with notation such as @@global.var_name for referring to
	  non-structured system variables.

       Currently, the first two rules have no possibility of being violated
       because the only structured variable type is the one for key caches.
       These rules will assume greater significance if some other type of
       structured variable is created in the future.

       With one exception, you can refer to structured variable components
       using compound names in any context where simple variable names can
       occur. For example, you can assign a value to a structured variable
       using a command-line option:

	  shell> mysqld --hot_cache.key_buffer_size=64K

       In an option file, use this syntax:

	  [mysqld]
	  hot_cache.key_buffer_size=64K

       If you start the server with this option, it creates a key cache named
       hot_cache with a size of 64KB in addition to the default key cache that
       has a default size of 8MB.

       Suppose that you start the server as follows:

	  shell> mysqld --key_buffer_size=256K \
		   --extra_cache.key_buffer_size=128K \
		   --extra_cache.key_cache_block_size=2048

       In this case, the server sets the size of the default key cache to
       256KB. (You could also have written --default.key_buffer_size=256K.) In
       addition, the server creates a second key cache named extra_cache that
       has a size of 128KB, with the size of block buffers for caching table
       index blocks set to 2048 bytes.

       The following example starts the server with three different key caches
       having sizes in a 3:1:1 ratio:

	  shell> mysqld --key_buffer_size=6M \
		   --hot_cache.key_buffer_size=2M \
		   --cold_cache.key_buffer_size=2M

       Structured variable values may be set and retrieved at runtime as well.
       For example, to set a key cache named hot_cache to a size of 10MB, use
       either of these statements:

	  mysql> SET GLOBAL hot_cache.key_buffer_size = 10*1024*1024;
	  mysql> SET @@global.hot_cache.key_buffer_size = 10*1024*1024;

       To retrieve the cache size, do this:

	  mysql> SELECT @@global.hot_cache.key_buffer_size;

       However, the following statement does not work. The variable is not
       interpreted as a compound name, but as a simple string for a LIKE
       pattern-matching operation:

	  mysql> SHOW GLOBAL VARIABLES LIKE 'hot_cache.key_buffer_size';

       This is the exception to being able to use structured variable names
       anywhere a simple variable name may occur.

   Dynamic System Variables
       Many server system variables are dynamic and can be set at runtime
       using SET GLOBAL or SET SESSION. You can also obtain their values using
       SELECT. See the section called “USING SYSTEM VARIABLES”.

       The following table shows the full list of all dynamic system
       variables. The last column indicates for each variable whether GLOBAL
       or SESSION (or both) apply. The table also lists session options that
       can be set with the SET statement.  Section 5.3, “SET Syntax”,
       discusses these options.

       Variables that have a type of “string” take a string value. Variables
       that have a type of “numeric” take a numeric value. Variables that have
       a type of “boolean” can be set to 0, 1, ON or OFF. (If you set them on
       the command line or in an option file, use the numeric values.)
       Variables that are marked as “enumeration” normally should be set to
       one of the available values for the variable, but can also be set to
       the number that corresponds to the desired enumeration value. For
       enumerated system variables, the first enumeration value corresponds to
       0. This differs from ENUM columns, for which the first enumeration
       value corresponds to 1.

       ┌────────────────────────────────┬────────────────┬──────────────────┐
       │Variable Name			│ Value Type	 │ Type		    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │character_set_server		│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │slave_transaction_retries	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │slow_launch_time		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sort_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_auto_is_null		│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_big_selects			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_big_tables			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_buffer_result		│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_log_bin			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_log_off			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_log_update			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │collation_connection		│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_low_priority_updates	│ boolean	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_max_join_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_mode			│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_notes			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_quote_show_create		│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_safe_updates		│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_select_limit		│ numeric	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_slave_skip_counter		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │updatable_views_with_limit	│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sql_warnings			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │collation_server		│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sync_binlog			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │sync_frm			│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │storage_engine			│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │table_cache			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │table_type			│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │thread_cache_size		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │time_zone			│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │timestamp			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │tmp_table_size			│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │transaction_alloc_block_size	│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │completion_type			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │transaction_prealloc_size	│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │tx_isolation			│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │unique_checks			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │wait_timeout			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │warning_count			│ numeric	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │concurrent_insert		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │connect_timeout			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │default_week_format		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │delay_key_write			│ OFF | ON | ALL │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │delayed_insert_limit		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │delayed_insert_timeout		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │autocommit			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │delayed_queue_size		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │div_precision_increment		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │engine_condition_pushdown	│ boolean	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │error_count			│ numeric	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │expire_logs_days		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │flush				│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │flush_time			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │foreign_key_checks		│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │ft_boolean_syntax		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │group_concat_max_len		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │big_tables			│ boolean	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │identity			│ numeric	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_autoextend_increment	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_commit_concurrency	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_concurrency_tickets	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_max_dirty_pages_pct	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_max_purge_lag		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_support_xa		│ boolean	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_sync_spin_loops		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_table_locks		│ boolean	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_thread_concurrency	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │binlog_cache_size		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │innodb_thread_sleep_delay	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │insert_id			│ numeric	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │interactive_timeout		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │join_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │key_buffer_size			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │last_insert_id			│ numeric	 │ SESSION	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │lc_time_names			│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │local_infile			│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │log_queries_not_using_indexes	│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │log_warnings			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │bulk_insert_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │long_query_time			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │low_priority_updates		│ boolean	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_allowed_packet		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_binlog_cache_size		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_binlog_size			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_connect_errors		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_connections			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_delayed_threads		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_error_count			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_heap_table_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │character_set_client		│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_insert_delayed_threads	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_join_size			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_prepared_stmt_count		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_relay_log_size		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_seeks_for_key		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_sort_length			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_tmp_tables			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_user_connections		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │max_write_lock_count		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │multi_read_range		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │character_set_connection	│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │myisam_data_pointer_size	│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │log_bin_trust_function_creators │ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │myisam_max_sort_file_size	│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │myisam_repair_threads		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │myisam_sort_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │myisam_stats_method		│ enum		 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │net_buffer_length		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │net_read_timeout		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │net_retry_count			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │net_write_timeout		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │character_set_filesystem	│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │old_passwords			│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │optimizer_prune_level		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │optimizer_search_depth		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │preload_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │query_alloc_block_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │query_cache_limit		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │query_cache_size		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │query_cache_type		│ enumeration	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │query_cache_wlock_invalidate	│ boolean	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │query_prealloc_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │character_set_results		│ string	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │range_alloc_block_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │read_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │read_only			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │read_rnd_buffer_size		│ numeric	 │ GLOBAL | SESSION │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │rpl_recovery_rank		│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │safe_show_database		│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │secure_auth			│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │server_id			│ numeric	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │slave_compressed_protocol	│ boolean	 │ GLOBAL	    │
       ├────────────────────────────────┼────────────────┼──────────────────┤
       │slave_net_timeout		│ numeric	 │ GLOBAL	    │
       └────────────────────────────────┴────────────────┴──────────────────┘

STATUS VARIABLES
       The server maintains many status variables that provide information
       about its operation. You can view these variables and their values by
       using the SHOW STATUS statement:

	  mysql> SHOW STATUS;
	  +-----------------------------------+------------+
	  | Variable_name		      | Value	   |
	  +-----------------------------------+------------+
	  | Aborted_clients		      | 0	   |
	  | Aborted_connects		      | 0	   |
	  | Bytes_received		      | 155372598  |
	  | Bytes_sent			      | 1176560426 |
	  | Connections			      | 30023	   |
	  | Created_tmp_disk_tables	      | 0	   |
	  | Created_tmp_files		      | 3	   |
	  | Created_tmp_tables		      | 2	   |
	  | Threads_created		      | 217	   |
	  | Threads_running		      | 88	   |
	  | Uptime			      | 1389872	   |
	  +-----------------------------------+------------+

       Many status variables are reset to 0 by the FLUSH STATUS statement.

       The status variables have the following meanings. Variables with no
       version indicated were already present prior to MySQL 5.0. For
       information regarding their implementation history, see MySQL 3.23,
       4.0, 4.1 Reference Manual.

       ·  Aborted_clients

	  The number of connections that were aborted because the client died
	  without closing the connection properly. See Section 2.10,
	  “Communication Errors and Aborted Connections”.

       ·  Aborted_connects

	  The number of failed attempts to connect to the MySQL server. See
	  Section 2.10, “Communication Errors and Aborted Connections”.

       ·  Binlog_cache_disk_use

	  The number of transactions that used the temporary binary log cache
	  but that exceeded the value of binlog_cache_size and used a
	  temporary file to store statements from the transaction.

       ·  Binlog_cache_use

	  The number of transactions that used the temporary binary log cache.

       ·  Bytes_received

	  The number of bytes received from all clients.

       ·  Bytes_sent

	  The number of bytes sent to all clients.

       ·  Com_xxx

	  The Com_xxx statement counter variables indicate the number of times
	  each xxx statement has been executed. There is one status variable
	  for each type of statement. For example, Com_delete and Com_insert
	  count DELETE and INSERT statements, respectively. However, if a
	  query result is returned from query cache, the server increments the
	  Qcache_hits status variable, not Com_select. See Section 12.4,
	  “Query Cache Status and Maintenance”.

	  All of the Com_stmt_xxx variables are increased even if a prepared
	  statement argument is unknown or an error occurred during execution.
	  In other words, their values correspond to the number of requests
	  issued, not to the number of requests successfully completed.

	  The Com_stmt_xxx status variables were added in 5.0.8:

	  ·  Com_stmt_prepare

	  ·  Com_stmt_execute

	  ·  Com_stmt_fetch

	  ·  Com_stmt_send_long_data

	  ·  Com_stmt_reset

	  ·  Com_stmt_close

	  Those variables stand for prepared statement commands. Their names
	  refer to the COM_xxx command set used in the network layer. In other
	  words, their values increase whenever prepared statement API calls
	  such as mysql_stmt_prepare(), mysql_stmt_execute(), and so forth are
	  executed. However, Com_stmt_prepare, Com_stmt_execute and
	  Com_stmt_close also increase for PREPARE, EXECUTE, or DEALLOCATE
	  PREPARE, respectively. Additionally, the values of the older
	  (available since MySQL 4.1.3) statement counter variables
	  Com_prepare_sql, Com_execute_sql, and Com_dealloc_sql increase for
	  the PREPARE, EXECUTE, and DEALLOCATE PREPARE statements.
	  Com_stmt_fetch stands for the total number of network round-trips
	  issued when fetching from cursors.

       ·  Compression

	  Whether the client connection uses compression in the client/server
	  protocol. Added in MySQL 5.0.16.

       ·  Connections

	  The number of connection attempts (successful or not) to the MySQL
	  server.

       ·  Created_tmp_disk_tables

	  The number of temporary tables on disk created automatically by the
	  server while executing statements.

       ·  Created_tmp_files

	  How many temporary files mysqld has created.

       ·  Created_tmp_tables

	  The number of in-memory temporary tables created automatically by
	  the server while executing statements. If Created_tmp_disk_tables is
	  large, you may want to increase the tmp_table_size value to cause
	  temporary tables to be memory-based instead of disk-based.

       ·  Delayed_errors

	  The number of rows written with INSERT DELAYED for which some error
	  occurred (probably duplicate key).

       ·  Delayed_insert_threads

	  The number of INSERT DELAYED handler threads in use.

       ·  Delayed_writes

	  The number of INSERT DELAYED rows written.

       ·  Flush_commands

	  The number of executed FLUSH statements.

       ·  Handler_commit

	  The number of internal COMMIT statements.

       ·  Handler_delete

	  The number of times that rows have been deleted from tables.

       ·  Handler_discover

	  The MySQL server can ask the NDB Cluster storage engine if it knows
	  about a table with a given name. This is called discovery.
	  Handler_discover indicates the number of times that tables have been
	  discovered via this mechanism.

       ·  Handler_prepare

	  A counter for the prepare phase of two-phase commit operations.
	  Added in MySQL 5.0.3.

       ·  Handler_read_first

	  The number of times the first entry was read from an index. If this
	  value is high, it suggests that the server is doing a lot of full
	  index scans; for example, SELECT col1 FROM foo, assuming that col1
	  is indexed.

       ·  Handler_read_key

	  The number of requests to read a row based on a key. If this value
	  is high, it is a good indication that your tables are properly
	  indexed for your queries.

       ·  Handler_read_next

	  The number of requests to read the next row in key order. This value
	  is incremented if you are querying an index column with a range
	  constraint or if you are doing an index scan.

       ·  Handler_read_prev

	  The number of requests to read the previous row in key order. This
	  read method is mainly used to optimize ORDER BY ... DESC.

       ·  Handler_read_rnd

	  The number of requests to read a row based on a fixed position. This
	  value is high if you are doing a lot of queries that require sorting
	  of the result. You probably have a lot of queries that require MySQL
	  to scan entire tables or you have joins that don't use keys
	  properly.

       ·  Handler_read_rnd_next

	  The number of requests to read the next row in the data file. This
	  value is high if you are doing a lot of table scans. Generally this
	  suggests that your tables are not properly indexed or that your
	  queries are not written to take advantage of the indexes you have.

       ·  Handler_rollback

	  The number of requests for a storage engine to perform a rollback
	  operation.

       ·  Handler_savepoint

	  The number of requests for a storage engine to place a savepoint.
	  Added in MySQL 5.0.3.

       ·  Handler_savepoint_rollback

	  The number of requests for a storage engine to roll back to a
	  savepoint. Added in MySQL 5.0.3.

       ·  Handler_update

	  The number of requests to update a row in a table.

       ·  Handler_write

	  The number of requests to insert a row in a table.

       ·  Innodb_buffer_pool_pages_data

	  The number of pages containing data (dirty or clean). Added in MySQL
	  5.0.2.

       ·  Innodb_buffer_pool_pages_dirty

	  The number of pages currently dirty. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_pages_flushed

	  The number of buffer pool page-flush requests. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_pages_free

	  The number of free pages. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_pages_latched

	  The number of latched pages in InnoDB buffer pool. These are pages
	  currently being read or written or that cannot be flushed or removed
	  for some other reason. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_pages_misc

	  The number of pages that are busy because they have been allocated
	  for administrative overhead such as row locks or the adaptive hash
	  index. This value can also be calculated as
	  Innodb_buffer_pool_pages_total – Innodb_buffer_pool_pages_free –
	  Innodb_buffer_pool_pages_data. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_pages_total

	  The total size of buffer pool, in pages. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_read_ahead_rnd

	  The number of “random” read-aheads initiated by InnoDB. This happens
	  when a query scans a large portion of a table but in random order.
	  Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_read_ahead_seq

	  The number of sequential read-aheads initiated by InnoDB. This
	  happens when InnoDB does a sequential full table scan. Added in
	  MySQL 5.0.2.

       ·  Innodb_buffer_pool_read_requests

	  The number of logical read requests InnoDB has done. Added in MySQL
	  5.0.2.

       ·  Innodb_buffer_pool_reads

	  The number of logical reads that InnoDB could not satisfy from the
	  buffer pool and had to do a single-page read. Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_wait_free

	  Normally, writes to the InnoDB buffer pool happen in the background.
	  However, if it is necessary to read or create a page and no clean
	  pages are available, it is also necessary to wait for pages to be
	  flushed first. This counter counts instances of these waits. If the
	  buffer pool size has been set properly, this value should be small.
	  Added in MySQL 5.0.2.

       ·  Innodb_buffer_pool_write_requests

	  The number writes done to the InnoDB buffer pool. Added in MySQL
	  5.0.2.

       ·  Innodb_data_fsyncs

	  The number of fsync() operations so far. Added in MySQL 5.0.2.

       ·  Innodb_data_pending_fsyncs

	  The current number of pending fsync() operations. Added in MySQL
	  5.0.2.

       ·  Innodb_data_pending_reads

	  The current number of pending reads. Added in MySQL 5.0.2.

       ·  Innodb_data_pending_writes

	  The current number of pending writes. Added in MySQL 5.0.2.

       ·  Innodb_data_read

	  The amount of data read so far, in bytes. Added in MySQL 5.0.2.

       ·  Innodb_data_reads

	  The total number of data reads. Added in MySQL 5.0.2.

       ·  Innodb_data_writes

	  The total number of data writes. Added in MySQL 5.0.2.

       ·  Innodb_data_written

	  The amount of data written so far, in bytes. Added in MySQL 5.0.2.

       ·  Innodb_dblwr_writes, Innodb_dblwr_pages_written

	  The number of doublewrite operations that have been performed and
	  the number of pages that have been written for this purpose. Added
	  in MySQL 5.0.2. See Section 2.14.1, “InnoDB Disk I/O”.

       ·  Innodb_log_waits

	  The number of times that the log buffer was too small and a wait was
	  required for it to be flushed before continuing. Added in MySQL
	  5.0.2.

       ·  Innodb_log_write_requests

	  The number of log write requests. Added in MySQL 5.0.2.

       ·  Innodb_log_writes

	  The number of physical writes to the log file. Added in MySQL 5.0.2.

       ·  Innodb_os_log_fsyncs

	  The number of fsync() writes done to the log file. Added in MySQL
	  5.0.2.

       ·  Innodb_os_log_pending_fsyncs

	  The number of pending log file fsync() operations. Added in MySQL
	  5.0.2.

       ·  Innodb_os_log_pending_writes

	  The number of pending log file writes. Added in MySQL 5.0.2.

       ·  Innodb_os_log_written

	  The number of bytes written to the log file. Added in MySQL 5.0.2.

       ·  Innodb_page_size

	  The compiled-in InnoDB page size (default 16KB). Many values are
	  counted in pages; the page size allows them to be easily converted
	  to bytes. Added in MySQL 5.0.2.

       ·  Innodb_pages_created

	  The number of pages created. Added in MySQL 5.0.2.

       ·  Innodb_pages_read

	  The number of pages read. Added in MySQL 5.0.2.

       ·  Innodb_pages_written

	  The number of pages written. Added in MySQL 5.0.2.

       ·  Innodb_row_lock_current_waits

	  The number of row locks currently being waited for. Added in MySQL
	  5.0.3.

       ·  Innodb_row_lock_time

	  The total time spent in acquiring row locks, in milliseconds. Added
	  in MySQL 5.0.3.

       ·  Innodb_row_lock_time_avg

	  The average time to acquire a row lock, in milliseconds. Added in
	  MySQL 5.0.3.

       ·  Innodb_row_lock_time_max

	  The maximum time to acquire a row lock, in milliseconds. Added in
	  MySQL 5.0.3.

       ·  Innodb_row_lock_waits

	  The number of times a row lock had to be waited for. Added in MySQL
	  5.0.3.

       ·  Innodb_rows_deleted

	  The number of rows deleted from InnoDB tables. Added in MySQL 5.0.2.

       ·  Innodb_rows_inserted

	  The number of rows inserted into InnoDB tables. Added in MySQL
	  5.0.2.

       ·  Innodb_rows_read

	  The number of rows read from InnoDB tables. Added in MySQL 5.0.2.

       ·  Innodb_rows_updated

	  The number of rows updated in InnoDB tables. Added in MySQL 5.0.2.

       ·  Key_blocks_not_flushed

	  The number of key blocks in the key cache that have changed but have
	  not yet been flushed to disk.

       ·  Key_blocks_unused

	  The number of unused blocks in the key cache. You can use this value
	  to determine how much of the key cache is in use; see the discussion
	  of key_buffer_size in the section called “SYSTEM VARIABLES”.

       ·  Key_blocks_used

	  The number of used blocks in the key cache. This value is a
	  high-water mark that indicates the maximum number of blocks that
	  have ever been in use at one time.

       ·  Key_read_requests

	  The number of requests to read a key block from the cache.

       ·  Key_reads

	  The number of physical reads of a key block from disk. If Key_reads
	  is large, then your key_buffer_size value is probably too small. The
	  cache miss rate can be calculated as Key_reads/Key_read_requests.

       ·  Key_write_requests

	  The number of requests to write a key block to the cache.

       ·  Key_writes

	  The number of physical writes of a key block to disk.

       ·  Last_query_cost

	  The total cost of the last compiled query as computed by the query
	  optimizer. This is useful for comparing the cost of different query
	  plans for the same query. The default value of 0 means that no query
	  has been compiled yet. This variable was added in MySQL 5.0.1, with
	  a default value of -1. In MySQL 5.0.7, the default was changed to 0;
	  also in version 5.0.7, the scope of Last_query_cost was changed to
	  session rather than global.

	  Prior to MySQL 5.0.16, this variable was not updated for queries
	  served from the query cache.

       ·  Max_used_connections

	  The maximum number of connections that have been in use
	  simultaneously since the server started.

       ·  Ndb_cluster_node_id

	  If the server is acting as a MySQL Cluster node, then the value of
	  this variable its node ID in the cluster.

	  If the server is not part of a MySQL Cluster, then the value of this
	  variable is 0.

       ·  Ndb_config_from_host

	  If the server is part of a MySQL Cluster, the value of this variable
	  is the hostname or IP address of the Cluster management server from
	  which it gets its configuration data.

	  If the server is not part of a MySQL Cluster, then the value of this
	  variable is an empty string.

	  Prior to MySQL 5.0.23, this variable was named Ndb_connected_host.

       ·  Ndb_config_from_port

	  If the server is part of a MySQL Cluster, the value of this variable
	  is the number of the port through which it is connected to the
	  CLuster management server from which it gets its configuration data.

	  If the server is not part of a MySQL Cluster, then the value of this
	  variable is 0.

	  Prior to MySQL 5.0.23, this variable was named Ndb_connected_port.

       ·  Ndb_number_of_data_nodes

	  If the server is part of a MySQL Cluster, the value of this variable
	  is the number of data nodes in the cluster.

	  If the server is not part of a MySQL Cluster, then the value of this
	  variable is 0.

	  Prior to MySQL 5.0.29, this variable was named
	  Ndb_number_of_storage_nodes.

       ·  Not_flushed_delayed_rows

	  The number of rows waiting to be written in INSERT DELAY queues.

       ·  Open_files

	  The number of files that are open.

       ·  Open_streams

	  The number of streams that are open (used mainly for logging).

       ·  Open_tables

	  The number of tables that are open.

       ·  Opened_tables

	  The number of tables that have been opened. If Opened_tables is big,
	  your table_cache value is probably too small.

       ·  Qcache_free_blocks

	  The number of free memory blocks in the query cache.

       ·  Qcache_free_memory

	  The amount of free memory for the query cache.

       ·  Qcache_hits

	  The number of query cache hits.

       ·  Qcache_inserts

	  The number of queries added to the query cache.

       ·  Qcache_lowmem_prunes

	  The number of queries that were deleted from the query cache because
	  of low memory.

       ·  Qcache_not_cached

	  The number of non-cached queries (not cacheable, or not cached due
	  to the query_cache_type setting).

       ·  Qcache_queries_in_cache

	  The number of queries registered in the query cache.

       ·  Qcache_total_blocks

	  The total number of blocks in the query cache.

       ·  Questions

	  The number of statements that clients have sent to the server.

       ·  Rpl_status

	  The status of fail-safe replication (not yet implemented).

       ·  Select_full_join

	  The number of joins that perform table scans because they do not use
	  indexes. If this value is not 0, you should carefully check the
	  indexes of your tables.

       ·  Select_full_range_join

	  The number of joins that used a range search on a reference table.

       ·  Select_range

	  The number of joins that used ranges on the first table.  This is
	  normally not a critical issue even if the value is quite large.

       ·  Select_range_check

	  The number of joins without keys that check for key usage after each
	  row. If this is not 0, you should carefully check the indexes of
	  your tables.

       ·  Select_scan

	  The number of joins that did a full scan of the first table.

       ·  Slave_open_temp_tables

	  The number of temporary tables that the slave SQL thread currently
	  has open.

       ·  Slave_running

	  This is ON if this server is a slave that is connected to a master.

       ·  Slave_retried_transactions

	  The total number of times since startup that the replication slave
	  SQL thread has retried transactions. This variable was added in
	  version 5.0.4.

       ·  Slow_launch_threads

	  The number of threads that have taken more than slow_launch_time
	  seconds to create.

       ·  Slow_queries

	  The number of queries that have taken more than long_query_time
	  seconds. See Section 10.4, “The Slow Query Log”.

       ·  Sort_merge_passes

	  The number of merge passes that the sort algorithm has had to do. If
	  this value is large, you should consider increasing the value of the
	  sort_buffer_size system variable.

       ·  Sort_range

	  The number of sorts that were done using ranges.

       ·  Sort_rows

	  The number of sorted rows.

       ·  Sort_scan

	  The number of sorts that were done by scanning the table.

       ·  Ssl_xxx

	  Variables used for SSL connections.

       ·  Table_locks_immediate

	  The number of times that a table lock was acquired immediately.

       ·  Table_locks_waited

	  The number of times that a table lock could not be acquired
	  immediately and a wait was needed. If this is high and you have
	  performance problems, you should first optimize your queries, and
	  then either split your table or tables or use replication.

       ·  Tc_log_max_pages_used

	  For the memory-mapped implementation of the log that is used by
	  mysqld when it acts as the transaction coordinator for recovery of
	  internal XA transactions, this variable indicates the largest number
	  of pages used for the log since the server started. If the product
	  of Tc_log_max_pages_used and Tc_log_page_size is always
	  significantly less than the log size, the size is larger than
	  necessary and can be reduced. (The size is set by the --log-tc-size
	  option. Currently, this variable is unused: It is unneeded for
	  binary log-based recovery, and the memory-mapped recovery log method
	  is not used unless the number of storage engines capable of
	  two-phase commit is greater than one. (InnoDB is the only applicable
	  engine.) Added in MySQL 5.0.3.

       ·  Tc_log_page_size

	  The page size used for the memory-mapped implementation of the XA
	  recovery log. The default value is determined using getpagesize().
	  Currently, this variable is unused for the same reasons as described
	  for Tc_log_max_pages_used. Added in MySQL 5.0.3.

       ·  Tc_log_page_waits

	  For the memory-mapped implementation of the recovery log, this
	  variable increments each time the server was not able to commit a
	  transaction and had to wait for a free page in the log. If this
	  value is large, you might want to increase the log size (with the
	  --log-tc-size option). For binary log-based recovery, this variable
	  increments each time the binary log cannot be closed because there
	  are two-phase commits in progress. (The close operation waits until
	  all such transactions are finished.) Added in MySQL 5.0.3.

       ·  Threads_cached

	  The number of threads in the thread cache.

       ·  Threads_connected

	  The number of currently open connections.

       ·  Threads_created

	  The number of threads created to handle connections. If
	  Threads_created is big, you may want to increase the
	  thread_cache_size value. The cache miss rate can be calculated as
	  Threads_created/Connections.

       ·  Threads_running

	  The number of threads that are not sleeping.

       ·  Uptime

	  The number of seconds that the server has been up.

SQL MODES
       The MySQL server can operate in different SQL modes, and can apply
       these modes differently for different clients. This capability enables
       each application to tailor the server's operating mode to its own
       requirements.

       For answers to some questions that are often asked about server SQL
       modes in MySQL, see Section 3, “MySQL 5.0 FAQ — Server SQL Mode”.

       Modes define what SQL syntax MySQL should support and what kind of data
       validation checks it should perform. This makes it easier to use MySQL
       in different environments and to use MySQL together with other database
       servers.

       You can set the default SQL mode by starting mysqld with the
       --sql-mode="modes" option.  modes is a list of different modes
       separated by comma (‘,’) characters. The default value is empty (no
       modes set). The modes value also can be empty (--sql-mode="") if you
       want to clear it explicitly.

       You can change the SQL mode at runtime by using a SET [GLOBAL|SESSION]
       sql_mode='modes' statement to set the sql_mode system value. Setting
       the GLOBAL variable requires the SUPER privilege and affects the
       operation of all clients that connect from that time on. Setting the
       SESSION variable affects only the current client. Any client can change
       its own session sql_mode value at any time.

       You can retrieve the current global or session sql_mode value with the
       following statements:

	  SELECT @@global.sql_mode;
	  SELECT @@session.sql_mode;

       The most important sql_mode values are probably these:

       ·  ANSI

	  Change syntax and behavior to be more conformant to standard SQL.

       ·  STRICT_TRANS_TABLES

	  If a value could not be inserted as given into a transactional
	  table, abort the statement. For a non-transactional table, abort the
	  statement if the value occurs in a single-row statement or the first
	  row of a multiple-row statement. More detail is given later in this
	  section. (Implemented in MySQL 5.0.2)

       ·  TRADITIONAL

	  Make MySQL behave like a “traditional” SQL database system. A simple
	  description of this mode is “give an error instead of a warning”
	  when inserting an incorrect value into a column.  Note: The
	  INSERT/UPDATE aborts as soon as the error is noticed. This may not
	  be what you want if you are using a non-transactional storage
	  engine, because data changes made prior to the error are not be
	  rolled back, resulting in a “partially done” update. (Added in MySQL
	  5.0.2)

       When this manual refers to “strict mode,” it means a mode where at
       least one of STRICT_TRANS_TABLES or STRICT_ALL_TABLES is enabled.

       The following list describes all supported modes:

       ·  ALLOW_INVALID_DATES

	  Don't do full checking of dates. Check only that the month is in the
	  range from 1 to 12 and the day is in the range from 1 to 31. This is
	  very convenient for Web applications where you obtain year, month,
	  and day in three different fields and you want to store exactly what
	  the user inserted (without date validation). This mode applies to
	  DATE and DATETIME columns. It does not apply TIMESTAMP columns,
	  which always require a valid date.

	  This mode is implemented in MySQL 5.0.2. Before 5.0.2, this was the
	  default MySQL date-handling mode. As of 5.0.2, the server requires
	  that month and day values be legal, and not merely in the range 1 to
	  12 and 1 to 31, respectively. With strict mode disabled, invalid
	  dates such as ´2004-04-31' are converted to ´0000-00-00' and a
	  warning is generated. With strict mode enabled, invalid dates
	  generate an error. To allow such dates, enable ALLOW_INVALID_DATES.

       ·  ANSI_QUOTES

	  Treat ‘"’ as an identifier quote character (like the ‘`’ quote
	  character) and not as a string quote character. You can still use
	  ‘`’ to quote identifiers with this mode enabled. With ANSI_QUOTES
	  enabled, you cannot use double quotes to quote literal strings,
	  because it is interpreted as an identifier.

       ·  ERROR_FOR_DIVISION_BY_ZERO

	  Produce an error in strict mode (otherwise a warning) when a
	  division by zero (or MOD(X,0)) occurs during an INSERT or UPDATE. If
	  this mode is not enabled, MySQL instead returns NULL for divisions
	  by zero. For INSERT IGNORE or UPDATE IGNORE, MySQL generates a
	  warning for divisions by zero, but the result of the operation is
	  NULL. (Implemented in MySQL 5.0.2)

       ·  HIGH_NOT_PRECEDENCE

	  From MySQL 5.0.2 on, the precedence of the NOT operator is such that
	  expressions such as NOT a BETWEEN b AND c are parsed as NOT (a
	  BETWEEN b AND c). Before MySQL 5.0.2, the expression is parsed as
	  (NOT a) BETWEEN b AND c. The old higher-precedence behavior can be
	  obtained by enabling the HIGH_NOT_PRECEDENCE SQL mode. (Added in
	  MySQL 5.0.2)

	  mysql> SET sql_mode = '';
	  mysql> SELECT NOT 1 BETWEEN -5 AND 5;
		  -> 0
	  mysql> SET sql_mode = 'HIGH_NOT_PRECEDENCE';
	  mysql> SELECT NOT 1 BETWEEN -5 AND 5;
		  -> 1

       ·  IGNORE_SPACE

	  Allow spaces between a function name and the ‘(’ character. This
	  causes function names to be treated as reserved words. As a result,
	  identifiers that are the same as function names must be quoted as
	  described in Section 2, “Database, Table, Index, Column, and Alias
	  Names”. For example, because there is a ABS() function, the use of
	  abs as a table name in the following statement causes an error:

	  mysql> CREATE TABLE abs (i INT);
	  ERROR 1064 (42000): You have an error in your SQL syntax
       The table name should be quoted:

	  mysql> CREATE TABLE `abs` (i INT);
	  Query OK, 0 rows affected (0.00 sec)
       The IGNORE_SPACE SQL mode applies to built-in functions, not to
       user-defined functions or stored routines. It is always allowable to
       have spaces after a UDF or routine name, regardless of whether
       IGNORE_SPACE is enabled.

       ·  NO_AUTO_CREATE_USER

	  Prevent the GRANT statement from automatically creating new users if
	  it would otherwise do so, unless a non-empty password also is
	  specified. (Added in MySQL 5.0.2)

       ·  NO_AUTO_VALUE_ON_ZERO

	  NO_AUTO_VALUE_ON_ZERO affects handling of AUTO_INCREMENT columns.
	  Normally, you generate the next sequence number for the column by
	  inserting either NULL or 0 into it.  NO_AUTO_VALUE_ON_ZERO
	  suppresses this behavior for 0 so that only NULL generates the next
	  sequence number.

	  This mode can be useful if 0 has been stored in a table's
	  AUTO_INCREMENT column. (Storing 0 is not a recommended practice, by
	  the way.) For example, if you dump the table with mysqldump and then
	  reload it, MySQL normally generates new sequence numbers when it
	  encounters the 0 values, resulting in a table with contents
	  different from the one that was dumped. Enabling
	  NO_AUTO_VALUE_ON_ZERO before reloading the dump file solves this
	  problem.  mysqldump now automatically includes in its output a
	  statement that enables NO_AUTO_VALUE_ON_ZERO, to avoid this problem.

       ·  NO_BACKSLASH_ESCAPES

	  Disable the use of the backslash character (‘\’) as an escape
	  character within strings. With this mode enabled, backslash becomes
	  an ordinary character like any other. (Implemented in MySQL 5.0.1)

       ·  NO_DIR_IN_CREATE

	  When creating a table, ignore all INDEX DIRECTORY and DATA DIRECTORY
	  directives. This option is useful on slave replication servers.

       ·  NO_ENGINE_SUBSTITUTION

	  Prevent automatic substitution of the default storage engine when a
	  statement such as CREATE TABLE specifies a storage engine that is
	  disabled or not compiled in. An error occurs instead. (Implemented
	  in MySQL 5.0.8)

       ·  NO_FIELD_OPTIONS

	  Do not print MySQL-specific column options in the output of SHOW
	  CREATE TABLE. This mode is used by mysqldump in portability mode.

       ·  NO_KEY_OPTIONS

	  Do not print MySQL-specific index options in the output of SHOW
	  CREATE TABLE. This mode is used by mysqldump in portability mode.

       ·  NO_TABLE_OPTIONS

	  Do not print MySQL-specific table options (such as ENGINE) in the
	  output of SHOW CREATE TABLE. This mode is used by mysqldump in
	  portability mode.

       ·  NO_UNSIGNED_SUBTRACTION

	  In integer subtraction operations, do not mark the result as
	  UNSIGNED if one of the operands is unsigned. In other words, the
	  result of a subtraction is always signed whenever this mode is in
	  effect, even if one of the operands is unsigned. For example,
	  compare the type of column c2 in table t1 with that of column c2 in
	  table t2:

	  mysql> SET SQL_MODE='';
	  mysql> CREATE TABLE test (c1 BIGINT UNSIGNED NOT NULL);
	  mysql> CREATE TABLE t1 SELECT c1 - 1 AS c2 FROM test;
	  mysql> DESCRIBE t1;
	  +-------+---------------------+------+-----+---------+-------+
	  | Field | Type		| Null | Key | Default | Extra |
	  +-------+---------------------+------+-----+---------+-------+
	  | c2	  | bigint(21) unsigned |      |     | 0       |       |
	  +-------+---------------------+------+-----+---------+-------+
	  mysql> SET SQL_MODE='NO_UNSIGNED_SUBTRACTION';
	  mysql> CREATE TABLE t2 SELECT c1 - 1 AS c2 FROM test;
	  mysql> DESCRIBE t2;
	  +-------+------------+------+-----+---------+-------+
	  | Field | Type       | Null | Key | Default | Extra |
	  +-------+------------+------+-----+---------+-------+
	  | c2	  | bigint(21) |      |	    | 0	      |	      |
	  +-------+------------+------+-----+---------+-------+
       Note that this means that BIGINT UNSIGNED is not 100% usable in all
       contexts. See Section 8, “Cast Functions and Operators”.

	  mysql> SET SQL_MODE = '';
	  mysql> SELECT CAST(0 AS UNSIGNED) - 1;
	  +-------------------------+
	  | CAST(0 AS UNSIGNED) - 1 |
	  +-------------------------+
	  |    18446744073709551615 |
	  +-------------------------+
	  mysql> SET SQL_MODE = 'NO_UNSIGNED_SUBTRACTION';
	  mysql> SELECT CAST(0 AS UNSIGNED) - 1;
	  +-------------------------+
	  | CAST(0 AS UNSIGNED) - 1 |
	  +-------------------------+
	  |			 -1 |
	  +-------------------------+

       ·  NO_ZERO_DATE

	  In strict mode, don't allow ´0000-00-00' as a valid date. You can
	  still insert zero dates with the IGNORE option. When not in strict
	  mode, the date is accepted but a warning is generated. (Added in
	  MySQL 5.0.2)

       ·  NO_ZERO_IN_DATE

	  In strict mode, don't accept dates where the month or day part is 0.
	  If used with the IGNORE option, MySQL inserts a ´0000-00-00' date
	  for any such date. When not in strict mode, the date is accepted but
	  a warning is generated. (Added in MySQL 5.0.2)

       ·  ONLY_FULL_GROUP_BY

	  Do not allow queries for which the SELECT list refers to
	  non-aggregated columns that are not named in the GROUP BY clause.
	  The following query is invalid with this mode enabled because
	  address is not named in the GROUP BY clause:

	  SELECT name, address, MAX(age) FROM t GROUP BY name;
       As of MySQL 5.0.23, this mode also restricts references to
       non-aggregated columns in the HAVING clause that are not named in the
       GROUP BY clause.

       ·  PIPES_AS_CONCAT

	  Treat || as a string concatenation operator (same as CONCAT())
	  rather than as a synonym for OR.

       ·  REAL_AS_FLOAT

	  Treat REAL as a synonym for FLOAT. By default, MySQL treats REAL as
	  a synonym for DOUBLE.

       ·  STRICT_ALL_TABLES

	  Enable strict mode for all storage engines. Invalid data values are
	  rejected. Additional detail follows. (Added in MySQL 5.0.2)

       ·  STRICT_TRANS_TABLES

	  Enable strict mode for transactional storage engines, and when
	  possible for non-transactional storage engines. Additional details
	  follow. (Implemented in MySQL 5.0.2)

       Strict mode controls how MySQL handles input values that are invalid or
       missing. A value can be invalid for several reasons. For example, it
       might have the wrong data type for the column, or it might be out of
       range. A value is missing when a new row to be inserted does not
       contain a value for a column that has no explicit DEFAULT clause in its
       definition.

       For transactional tables, an error occurs for invalid or missing values
       in a statement when either of the STRICT_ALL_TABLES or
       STRICT_TRANS_TABLES modes are enabled. The statement is aborted and
       rolled back.

       For non-transactional tables, the behavior is the same for either mode,
       if the bad value occurs in the first row to be inserted or updated. The
       statement is aborted and the table remains unchanged. If the statement
       inserts or modifies multiple rows and the bad value occurs in the
       second or later row, the result depends on which strict option is
       enabled:

       ·  For STRICT_ALL_TABLES, MySQL returns an error and ignores the rest
	  of the rows. However, in this case, the earlier rows still have been
	  inserted or updated. This means that you might get a partial update,
	  which might not be what you want. To avoid this, it's best to use
	  single-row statements because these can be aborted without changing
	  the table.

       ·  For STRICT_TRANS_TABLES, MySQL converts an invalid value to the
	  closest valid value for the column and insert the adjusted value. If
	  a value is missing, MySQL inserts the implicit default value for the
	  column data type. In either case, MySQL generates a warning rather
	  than an error and continues processing the statement. Implicit
	  defaults are described in Section 1.4, “Data Type Default Values”.

       Strict mode disallows invalid date values such as ´2004-04-31'. It does
       not disallow dates with zero parts such as ´2004-04-00' or “zero”
       dates. To disallow these as well, enable the NO_ZERO_IN_DATE and
       NO_ZERO_DATE SQL modes in addition to strict mode.

       If you are not using strict mode (that is, neither STRICT_TRANS_TABLES
       nor STRICT_ALL_TABLES is enabled), MySQL inserts adjusted values for
       invalid or missing values and produces warnings. In strict mode, you
       can produce this behavior by using INSERT IGNORE or UPDATE IGNORE. See
       Section 5.4.26, “SHOW WARNINGS Syntax”.

       The following special modes are provided as shorthand for combinations
       of mode values from the preceding list. All are available in MySQL 5.0
       beginning with version 5.0.0, except for TRADITIONAL, which was
       implemented in MySQL 5.0.2.

       The descriptions include all mode values that are available in the most
       recent version of MySQL. For older versions, a combination mode does
       not include individual mode values that are not available except in
       newer versions.

       ·  ANSI

	  Equivalent to REAL_AS_FLOAT, PIPES_AS_CONCAT, ANSI_QUOTES,
	  IGNORE_SPACE. Before MySQL 5.0.3, ANSI also includes
	  ONLY_FULL_GROUP_BY. See Section 9.3, “Running MySQL in ANSI Mode”.

       ·  DB2

	  Equivalent to PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE,
	  NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS.

       ·  MAXDB

	  Equivalent to PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE,
	  NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS,
	  NO_AUTO_CREATE_USER.

       ·  MSSQL

	  Equivalent to PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE,
	  NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS.

       ·  MYSQL323

	  Equivalent to NO_FIELD_OPTIONS, HIGH_NOT_PRECEDENCE.

       ·  MYSQL40

	  Equivalent to NO_FIELD_OPTIONS, HIGH_NOT_PRECEDENCE.

       ·  ORACLE

	  Equivalent to PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE,
	  NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS,
	  NO_AUTO_CREATE_USER.

       ·  POSTGRESQL

	  Equivalent to PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE,
	  NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS.

       ·  TRADITIONAL

	  Equivalent to STRICT_TRANS_TABLES, STRICT_ALL_TABLES,
	  NO_ZERO_IN_DATE, NO_ZERO_DATE, ERROR_FOR_DIVISION_BY_ZERO,
	  NO_AUTO_CREATE_USER.

THE SHUTDOWN PROCESS
       The server shutdown process takes place as follows:

       1. The shutdown process is initiated.

	  Server shutdown can be initiated several ways. For example, a user
	  with the SHUTDOWN privilege can execute a mysqladmin shutdown
	  command.  mysqladmin can be used on any platform supported by MySQL.
	  Other operating system-specific shutdown initiation methods are
	  possible as well: The server shuts down on Unix when it receives a
	  SIGTERM signal. A server running as a service on Windows shuts down
	  when the services manager tells it to.

       2. The server creates a shutdown thread if necessary.

	  Depending on how shutdown was initiated, the server might create a
	  thread to handle the shutdown process. If shutdown was requested by
	  a client, a shutdown thread is created. If shutdown is the result of
	  receiving a SIGTERM signal, the signal thread might handle shutdown
	  itself, or it might create a separate thread to do so. If the server
	  tries to create a shutdown thread and cannot (for example, if memory
	  is exhausted), it issues a diagnostic message that appears in the
	  error log:

	  Error: Can't create thread to kill server

       3. The server stops accepting new connections.

	  To prevent new activity from being initiated during shutdown, the
	  server stops accepting new client connections. It does this by
	  closing the network connections to which it normally listens for
	  connections: the TCP/IP port, the Unix socket file, the Windows
	  named pipe, and shared memory on Windows.

       4. The server terminates current activity.

	  For each thread that is associated with a client connection, the
	  connection to the client is broken and the thread is marked as
	  killed. Threads die when they notice that they are so marked.
	  Threads for idle connections die quickly. Threads that currently are
	  processing statements check their state periodically and take longer
	  to die. For additional information about thread termination, see
	  Section 5.5.3, “KILL Syntax”, in particular for the instructions
	  about killed REPAIR TABLE or OPTIMIZE TABLE operations on MyISAM
	  tables.

	  For threads that have an open transaction, the transaction is rolled
	  back. Note that if a thread is updating a non-transactional table,
	  an operation such as a multiple-row UPDATE or INSERT may leave the
	  table partially updated, because the operation can terminate before
	  completion.

	  If the server is a master replication server, threads associated
	  with currently connected slaves are treated like other client
	  threads. That is, each one is marked as killed and exits when it
	  next checks its state.

	  If the server is a slave replication server, the I/O and SQL
	  threads, if active, are stopped before client threads are marked as
	  killed. The SQL thread is allowed to finish its current statement
	  (to avoid causing replication problems), and then stops. If the SQL
	  thread was in the middle of a transaction at this point, the
	  transaction is rolled back.

       5. Storage engines are shut down or closed.

	  At this stage, the table cache is flushed and all open tables are
	  closed.

	  Each storage engine performs any actions necessary for tables that
	  it manages. For example, MyISAM flushes any pending index writes for
	  a table.  InnoDB flushes its buffer pool to disk (starting from
	  5.0.5: unless innodb_fast_shutdown is 2), writes the current LSN to
	  the tablespace, and terminates its own internal threads.

       6. The server exits.

SERVER-SIDE HELP
       MySQL Server supports a HELP statement that returns online information
       from the MySQL Reference manual (see Section 3.2, “HELP Syntax”). The
       proper operation of this statement requires that the help tables in the
       mysql database be initialized with help topic information, which is
       done by processing the contents of the fill_help_tables.sql script.

       For a MySQL binary distribution on Unix, help table setup occurs when
       you run mysql_install_db. For an RPM distribution on Linux or binary
       distribution on Windows, help table setup occurs as part of the MySQL
       installation process.

       For a MySQL source distribution, you can find the fill_help_tables_sql
       file in the scripts directory. To load the file manually, make sure
       that you have initialized the mysql database by running
       mysql_install_db, and then process the file with the mysql client as
       follows:

	  shell> mysql -u root mysql < fill_help_tables.sql

       If you are working with BitKeeper and a MySQL development source tree,
       the tree doesn't contain fill_help_tables.sql. You can download the
       proper file for your version of MySQL from http://dev.mysql.com/doc/.
       After downloading and uncompressing the file, process it with mysql as
       just described.

COPYRIGHT
       Copyright 1997-2006 MySQL AB

       This documentation is NOT distributed under a GPL license. Use of this
       documentation is subject to the following terms: You may create a
       printed copy of this documentation solely for your own personal use.
       Conversion to other formats is allowed as long as the actual content is
       not altered or edited in any way. You shall not publish or distribute
       this documentation in any form or on any media, except if you
       distribute the documentation in a manner similar to how MySQL
       disseminates it (that is, electronically for download on a Web site
       with the software) or on a CD-ROM or similar medium, provided however
       that the documentation is disseminated together with the software on
       the same medium. Any other use, such as any dissemination of printed
       copies or use of this documentation, in whole or in part, in another
       publication, requires the prior written consent from an authorized
       representative of MySQL AB. MySQL AB reserves any and all rights to
       this documentation not expressly granted above.

       Please email <docs@mysql.com> for more information.

SEE ALSO
       msql2mysql(1), my_print_defaults(1), myisam_ftdump(1), myisamchk(1),
       myisamlog(1), myisampack(1), mysql(1), mysql.server(1),
       mysql_config(1), mysql_explain_log(1), mysql_fix_privilege_tables(1),
       mysql_tzinfo_to_sql(1), mysql_upgrade(1), mysql_zap(1), mysqlaccess(1),
       mysqladmin(1), mysqlbinlog(1), mysqlcheck(1), mysqld_multi(1),
       mysqld_safe(1), mysqldump(1), mysqlhotcopy(1), mysqlimport(1),
       mysqlmanager(8), mysqlshow(1), perror(1), replace(1), safe_mysqld(1)

       For more information, please refer to the MySQL Reference Manual, which
       may already be installed locally and which is also available online at
       http://dev.mysql.com/doc/.

AUTHOR
       MySQL AB (http://www.mysql.com/).  This software comes with no
       warranty.

MySQL 5.0			  01/09/2007			     MYSQLD(8)
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