High Service Check Latency

[Jake Xu]

Simon, have you tried enabling the use_large_installation_tweaks=1 option
in nagios.cfg?
Enabling that option helps me eliminate the check latency but increases the
load on cpu significantly.

You may want to give that a try.

Jake

On Wed, May 23, 2012 at 2:52 AM, Simone Felici <s.felici at mclink.eu> wrote:

> So, cpuload is stable around 5.00 - 5.50. IO wait is difficult to identify.
> Using top I can read an average of 0% with some peaks up to 4%. Using
> iotop the process kjournald is
> jumping on first position often with peaks to 10-20%, back to 0 immediatly.
> Second place for nagios process. But the 1sec refresh is changing very
> often the situation.
> Semms really interesting your doc, also I'll try some solutions. I'll use
> sym links to not alter any
> configuration file. Should do the trick as well. I'll let you know!
>
> Thank you!
>
> Simon
>
>
> Il 22/05/2012 16:34, Mike Guthrie ha scritto:
> > What kind of information do you have about average CPU load or I\O wait
> > time?  Whether Nagios is using ndoutils or not there will be a hardware
> > limit as to how many disk writes it can handle in a given period of
> > time.  Even though you're only running a few active checks, it could be
> > a symptom that your machine is having to wait on itself to write to disk
> > for other things as well.  The doc below is written for Nagios XI, but
> > of a lot of the items apply to Core as well.  I would consider exploring
> > some options with a RAM disk in order to reduce disk activity.
> >
> >
> http://assets.nagios.com/downloads/nagiosxi/docs/Utilizing_A_RAM_Disk_In_NagiosXI.pdf
> >
>
>
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Exclusive live event will cover all the ways today's security and 
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