CPU performance with Nagios 3.2.3
Javier González
jagonzalaz at gmail.com
Wed Jul 20 09:58:18 CEST 2011
Thanks
2011/7/20 Yueh-Hung Liu <yuehung.liu at gmail.com>
> maybe you can check out the cron table to see what are running
> periodically.
> but i think the load is no problem, unless the value remains very high
> for a long time.
>
>
> 2011/7/20 Javier González <jagonzalaz at gmail.com>:
> > Thank you Yueh-Hung Liu,
> > Is it possible to discover what´s the problem with the Load, which
> processes
> > take all the CPU time periodically ???
> > Could i do something to improve the CPU usage ?
> >
> > 2011/7/19 Yueh-Hung Liu <yuehung.liu at gmail.com>
> >>
> >> load is not the same as cpu usage, load is the number of queued
> >> processes in a period.
> >> maybe there are processes waiting for some events, such as I/O.
> >>
> >>
> >> 2011/7/19 Javier González <jagonzalaz at gmail.com>:
> >> > Hello,
> >> > I have seen a lot peaks on the CPU LOAD of my nagios machine (See
> >> > pnp4nagios
> >> > graphs on pdf document attached).
> >> > I don´t know which process/processes are the ones that use too much
> CPU
> >> > on
> >> > that periods because the PC is only used for Nagios (And plugins used
> >> > with
> >> > it) and all the plugins defined have a check_period of 1 minute and
> >> > there is
> >> > a lot of periods where the load is near to 0 (so what happens every 2
> >> > hours
> >> > more or less that use so much CPU???)
> >> > I have tried to find the process that causes this behavior with the
> >> > "top"
> >> > command but %Cpu idle is always (also on the peaks of the CPU LOAD)
> more
> >> > han
> >> > 70% and no process uses more than 4% of CPU (See three examples of TOP
> >> > command where %CPU idle is always high but Load vary a lot on each
> case)
> >> > ******************************************************************
> >> > top - 11:52:27 up 9:51, 1 user, load average: 0.09, 0.56, 0.62
> >> > Tasks: 102 total, 1 running, 101 sleeping, 0 stopped, 0 zombie
> >> > Cpu(s): 7.9%us, 1.5%sy, 0.0%ni, 88.4%id, 1.0%wa, 0.3%hi, 0.8%si,
> >> > 0.0%st
> >> > Mem: 2050176k total, 675704k used, 1374472k free, 132628k
> buffers
> >> > Swap: 2096472k total, 0k used, 2096472k free, 333384k
> cached
> >> > top - 13:30:05 up 11:29, 2 users, load average: 1.53, 1.27, 0.83
> >> > Tasks: 110 total, 3 running, 107 sleeping, 0 stopped, 0 zombie
> >> > Cpu(s): 9.2%us, 1.5%sy, 0.0%ni, 88.6%id, 0.0%wa, 0.0%hi, 0.7%si,
> >> > 0.0%st
> >> > Mem: 2050176k total, 708540k used, 1341636k free, 139020k
> buffers
> >> > Swap: 2096472k total, 0k used, 2096472k free, 334668k
> cached
> >> > top - 13:16:39 up 1 day, 11:15, 2 users, load average: 2.45, 2.03,
> >> > 1.96
> >> > Tasks: 106 total, 1 running, 105 sleeping, 0 stopped, 0 zombie
> >> > Cpu(s): 7.8%us, 1.4%sy, 0.0%ni, 89.1%id, 1.0%wa, 0.2%hi, 0.5%si,
> >> > 0.0%st
> >> > Mem: 2050176k total, 845668k used, 1204508k free, 167244k
> buffers
> >> > Swap: 2096472k total, 0k used, 2096472k free, 351224k
> cached
> >> >
> >> >
> >> >
> >> > ********************************************************************
> >> >
> >> > Is there some way to find wich process cause this high CPU LOAD ?
> (Which
> >> > proccess use sometimes a lot of the CPU time so queuing other
> >> > processes).
> >> > Why sometimes the CPU Load is near to 0 and other times Load_1_min is
> >> > near
> >> > to 4 (On the example 2,45 but there are higher values) if the
> processes
> >> > are
> >> > always the same ???
> >> > Thank you very much
> >> >
> >> >
> *****************************************************************************
> >> > Environment Description.
> >> > Intel Core 2 DUO E7500 / 2,93GHz
> >> > DDR2 2GB / 667MHz
> >> > Centos 5.5
> >> > Nagios 3.2.3
> >> > nagios-plugins-1.4.11
> >> > net-snmp-5.6
> >> > snmptt-1.3
> >> > mklivestatus-1.1.8
> >> > nagvis-1.5.6
> >> > pnp4nagios-0.6.10
> >> >
> >> >
> ------------------------------------------------------------------------------
> >> > Magic Quadrant for Content-Aware Data Loss Prevention
> >> > Research study explores the data loss prevention market. Includes
> >> > in-depth
> >> > analysis on the changes within the DLP market, and the criteria used
> to
> >> > evaluate the strengths and weaknesses of these DLP solutions.
> >> > http://www.accelacomm.com/jaw/sfnl/114/51385063/
> >> > _______________________________________________
> >> > Nagios-users mailing list
> >> > Nagios-users at lists.sourceforge.net
> >> > https://lists.sourceforge.net/lists/listinfo/nagios-users
> >> > ::: Please include Nagios version, plugin version (-v) and OS when
> >> > reporting
> >> > any issue.
> >> > ::: Messages without supporting info will risk being sent to /dev/null
> >> >
> >>
> >>
> >>
> ------------------------------------------------------------------------------
> >> Magic Quadrant for Content-Aware Data Loss Prevention
> >> Research study explores the data loss prevention market. Includes
> in-depth
> >> analysis on the changes within the DLP market, and the criteria used to
> >> evaluate the strengths and weaknesses of these DLP solutions.
> >> http://www.accelacomm.com/jaw/sfnl/114/51385063/
> >> _______________________________________________
> >> Nagios-users mailing list
> >> Nagios-users at lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/nagios-users
> >> ::: Please include Nagios version, plugin version (-v) and OS when
> >> reporting any issue.
> >> ::: Messages without supporting info will risk being sent to /dev/null
> >
> >
> >
> ------------------------------------------------------------------------------
> > 10 Tips for Better Web Security
> > Learn 10 ways to better secure your business today. Topics covered
> include:
> > Web security, SSL, hacker attacks & Denial of Service (DoS), private
> keys,
> > security Microsoft Exchange, secure Instant Messaging, and much more.
> > http://www.accelacomm.com/jaw/sfnl/114/51426210/
> > _______________________________________________
> > Nagios-users mailing list
> > Nagios-users at lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/nagios-users
> > ::: Please include Nagios version, plugin version (-v) and OS when
> reporting
> > any issue.
> > ::: Messages without supporting info will risk being sent to /dev/null
> >
>
>
> ------------------------------------------------------------------------------
> 10 Tips for Better Web Security
> Learn 10 ways to better secure your business today. Topics covered include:
> Web security, SSL, hacker attacks & Denial of Service (DoS), private keys,
> security Microsoft Exchange, secure Instant Messaging, and much more.
> http://www.accelacomm.com/jaw/sfnl/114/51426210/
> _______________________________________________
> Nagios-users mailing list
> Nagios-users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/nagios-users
> ::: Please include Nagios version, plugin version (-v) and OS when
> reporting any issue.
> ::: Messages without supporting info will risk being sent to /dev/null
>
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10 Tips for Better Web Security
Learn 10 ways to better secure your business today. Topics covered include:
Web security, SSL, hacker attacks & Denial of Service (DoS), private keys,
security Microsoft Exchange, secure Instant Messaging, and much more.
http://www.accelacomm.com/jaw/sfnl/114/51426210/
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