|
Checking
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Procedure
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Results
|
Action
|
|---|
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Error Messages
|
Check non-graphical console screen
|
filesystem full
|
Move or remove files from that filesystem
|
|
Error Messages
|
Check non-graphical console screen
|
inode table overflow
|
Increase number of inodes for that filesystem
|
|
Paging
|
sar -pgruwd
|
bad response, %(wio + idle) high,
freemem often low,
pfree/s and vscan/s high,
swpots/s > 0 often,
high disk %busy
|
Increase memory
|
|
Disk Usage
|
sar -udb
|
bad response, high %(wio + idle),
subset of disks have high %busy,
avwait, or avque
|
Balance disk load (move users)
|
|
Disk Usage
|
sar -udb
|
bad response, high %(wio + idle),
all disks have high %busy,
avwait, or avque
|
Add disks
|
|
Buffer Usage
|
sar -udb
|
%(wio + idle) high,
%rcache < 90,
%wcache < 65,
bread/s, bwrite/s high
|
Increase BUFHWM
|
|
Modem Interrupts
|
sar -y
|
mdmin/s > 1
|
Repair modems, terminals, lines
|
|
Table Sizes
|
sar -vt
|
ov > 0 fail > 0
|
Increase table sizes
|
|
Job Schedules
|
ps -ef
|
Large batch jobs, non-essential commands or users
|
Reschedule jobs or move jobs to other systems
|