Kswapd high cpu utilization.

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09-04-2015

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Kswapd high cpu utilization.

Hi,

Please suggest how to troubleshoot, kswapd is utilizing high cpu?

also wanted to know which parameters are important and needs to be added with sar command for monitoring the performance of Linux (Oracle 5.8 -64 bit

Please guide me.

I am facing the issue where server is getting too slow and not able to connect some time.

manoj.solaris

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LEARN ABOUT FREEBSD

pmc_disable

PMC_ENABLE(3)						   BSD Library Functions Manual 					     PMC_ENABLE(3)

NAME

     pmc_disable, pmc_enable -- administrative control of hardware performance counters

LIBRARY

     Performance Counters Library (libpmc, -lpmc)

SYNOPSIS

     #include <pmc.h>

     int
     pmc_disable(int cpu, int pmc);

     int
     pmc_enable(int cpu, int pmc);

DESCRIPTION

     These functions allow specific hardware performance monitoring counters in a system to be disabled and enabled administratively.  The hard-
     ware performance counters available on each CPU are numbered using small non-negative integers, in a system dependent manner.  Disabled coun-
     ters will not be available to applications for use.

     The invoking process needs to have the PRIV_PMC_MANAGE privilege to perform these operations.

     Function pmc_disable() disables the hardware counter numbered by argument pmc on CPU number cpu.

     Function pmc_enable() enables the hardware counter numbered by argument pmc on CPU number cpu.

IMPLEMENTATION NOTES

     Hardware PMCs that are currently in use by applications cannot be disabled.  Allocation of a process scope software PMC marks all hardware
     PMCs in the system with the same pmc number as being in-use.

RETURN VALUES

     Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS

     A call to these functions may fail with the following errors:

     [EBUSY]		Function pmc_disable() specified a hardware PMC is currently in use.

     [EINVAL]		Arguments cpu or pmc were invalid.

     [ENXIO]		Argument cpu specified a disabled or absent CPU.

     [EPERM]		The current process lacks sufficient privilege to perform this operation.

SEE ALSO

     pmc(3), pmc_cpuinfo(3), pmc_pmcinfo(3), hwpmc(4), pmccontrol(8), priv_check(9)

BSD
								September 22, 2008							       BSD

Red Hat