Question about Service State Latency

[Marc Powell]

> -----Original Message-----
> From: nagios-devel-admin at lists.sourceforge.net [mailto:nagios-devel-
> admin at lists.sourceforge.net] On Behalf Of Joseph Hardeman
> Sent: Thursday, August 11, 2005 7:17 AM
> To: nagios-devel at lists.sourceforge.net
> Subject: [Nagios-devel] Question about Service State Latency
> 
> Greetings,
> 
> I have been asked to find out what the Latency entry on the Service
> State Information page represents.  I am hoping that you can help me
> understand where Nagios is getting this number from and how it is

The Latency measure is related to check scheduling -- 

http://nagios.sourceforge.net/docs/1_0/checkscheduling.html

It is the time difference between when a check was scheduled to run and
when it actually did. Normally that number is at or around 0 but can be
higher in periods of high numbers of outages. Generally this is tweaked
by max_concurrent_checks and command_check_interval (for passive
checks). If you find that your latency is high often, you're probably
not allowing nagios to spawn enough children to run parallel plugins.
Run bin/nagios -s etc/nagios.cfg to get a recommended value. I generally
add another 20% on top of that. It could also be that you have your
plugin timeout values set very high and the plugins are taking longer to
finish than the really need to.

> calculated.  Also, is there a way or a plugin to do an immediate check
> on Latency between the Nagios server and the client?  We have about
> 500+ locations that we are checking and want to make sure that they
> are all within reasonable rta's.

Check_ping.

--
Marc


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