nagios service check latency

Marc Powell marc at ena.com
Thu Apr 26 12:37:56 CEST 2007



> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net [mailto:nagios-users-
> bounces at lists.sourceforge.net] On Behalf Of James
> Sent: Wednesday, April 25, 2007 5:59 PM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] nagios service check latency
> 
> Ok i have a question about setting priority to service checks
> 
> since i have a handful of service check checking clusters of servers
i'd
> like the priority of those service checks as high as for instance...
> host checks
> 
> as in they happen regularly and almost instantly without latency
> 
> Now my service checks used to be REALLY high latency but i removed
> unnecessary active checks on certain services. However my service
checks
> for my clusters are still latent by about 5 minutes. Is there anyway
to
> reduce this or just say that a certain service check should have zero
> latency?

That is a really high latency and seems to imply either that you're
starving nagios for resources or you're doing lots of host checks. How
many hosts/services are you checking on what kind of hardware? Have you
looked at the performance tuning documentation? For a benchmark, I have
machines doing just over a thousand service checks every 5 minutes
(mostly check_fping) with a max latency of under 5 seconds and average
latency of 0.638 seconds at the moment.

There's no way to tell nagios that certain service checks have a higher
priority over others outside of
normal_check_interval/retry_check_interval. The scheduler just
automagically figures out what to do based on your config.

--
Marc

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