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Operating Systems AIX Hard disk usage is 100 Percent Busy for any command Post 302145359 by npcrao on Wednesday 14th of November 2007 02:22:08 AM
Old 11-14-2007
Hi,

Understood the concept.

But advice me how to improve the performance.

Not only for tar but even also for chmod...it takes long time to complete.

Any parameter's to be tuned up.?

Thanks in Advance.
 

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PMCCONTROL(8)						    BSD System Manager's Manual 					     PMCCONTROL(8)

NAME
pmccontrol -- control hardware performance monitoring counters SYNOPSIS
pmccontrol [-c cpu | -d pmc | -e pmc] ... pmccontrol -l pmccontrol -L pmccontrol -s DESCRIPTION
The pmccontrol utility controls the operation of the system's hardware performance monitoring counters. OPTIONS
The pmccontrol utility processes options in command line order, so later options modify the effect of earlier ones. The following options are available: -c cpu Subsequent enable and disable options affect the CPU denoted by argument cpu. The argument cpu is a number denoting a CPU in the system, or ``*'', denoting all unhalted CPUs in the system. -d pmc Disable PMC number pmc on the CPU specified by -c, preventing it from being used till subsequently re-enabled. The argument pmc is a number denoting a specific PMC, or ``*'' denoting all the PMCs on the specified CPU. Only idle PMCs may be disabled. -e pmc Enable PMC number pmc, on the CPU specified by -c, allowing it to be used in the future. The argument pmc is a number denoting a specific PMC, or ``*'' denoting all the PMCs on the specified CPU. If PMC pmc is already enabled, this option has no effect. -l List available hardware performance counters and their current disposition. -L List available hardware performance counter classes and their supported event names. -s Print driver statistics maintained by hwpmc(4). EXAMPLES
To disable all PMCs on all CPUs, use the command: pmccontrol -d* To enable all PMCs on all CPUs, use: pmccontrol -e* To disable PMCs 0 and 1 on CPU 2, use: pmccontrol -c2 -d0 -d1 To disable PMC 0 of CPU 0 only, and enable all other PMCS on all other CPUs, use: pmccontrol -c* -e* -c0 -d0 DIAGNOSTICS
The pmccontrol utility exits 0 on success, and >0 if an error occurs. SEE ALSO
pmc(3), pmclog(3), hwpmc(4), pmcstat(8), sysctl(8) HISTORY
The pmccontrol utility first appeared in FreeBSD 6.0. AUTHORS
Joseph Koshy <jkoshy@FreeBSD.org> BSD
November 9, 2008 BSD
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