GETDELAYS(1)GETDELAYS(1)NAME
getdelays -- Display delay statistics
SYNOPSIS
getdelays -c command
getdelays -p pid
getdelays -t tid
DESCRIPTION
The getdelays utility helps pin-point possible resource shortages when
running an application. The SLES10 kernel includes patches to implement
delay accounting, which measures the time a process spends waiting for
disk I/O, swap I/O and CPU time slices. For example, if an application
is running rather slowly, delay accounting can tell you where it spends
all its time.
For instance, when the CPU delay is high, this means the application is
competing with other proces for run time, but is losing quite often.
High memory delays mean that the sum of applications running on this
system need more physical memory than is available, and are swapping
quite a lot.
In order to enable delay accounting, you need to specify delayacct on
the kernel command line when booting the system.
Getdelays has three modes of operation:
getdelays -c command
This will invoke command and print a summary of delay statistics
when the command finishes.
getdelays -p pid
This will print the current delay statistics of the process
identified pid.
getdelays -t tid
This will print the current delay statistics of the thread group
identified tid.
AUTHOR
Balbir Singh, IBM Corp.
Shailabh Nagar, IBM Corp.
Manpage contributed by Olaf Kirch <okir@suse.de>
April 13, 2006 GETDELAYS(1)