check scheduler tuning !

[kmizole]

Thomas,

thanks for your reply, i checked the latency and you were right, i
have a 5 minutes latency between service checks.
I already looked at the nagios config file and tried different
settings without success.
I disabled active hosts checks and the latency between service checks reduces.

Thanks for your help.

But imagine i would like to keep the host checks (check_host_alive)
with a inter check delay of 3 minutes. Is it possible to run such a
configuration with 100+ hosts and 1000+ active service checks without
having a great latency ?

Sébastien

On Tue, Apr 29, 2008 at 10:21 AM, Thomas Guyot-Sionnest <dermoth at aei.ca> wrote:
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>
>  On 29/04/08 03:38 AM, kmizole wrote:
>  > Hello there,
>  >
>  > I''ve installed a monitoring suite with Nagios and Centreon. But i
>  > have a problem with scheduling. After one night my scheduler displays
>  > next checks one hour before the actual time.
>  >
>  > Is there a way to optimize scheduler to get services checks on time.
>
>  You're probably having check latency. Look at the "Performance Info"
>  page... Active Service Check Latency should be near 0. If it's not you
>  have a problem.
>
>  Here's an overview or how scheduling works in Nagios:
>  http://nagios.sourceforge.net/docs/2_0/checkscheduling.html
>
>  Keep in mind that the following things will cause Nagios to stop
>  processing commands until the external command returns:
>  Host checks (performed on non-OK states, this can be solved in Nagios 3)
>  Event handlers
>  Performance data processing commands
>  OCSP Commands
>
>  - - It's not a good idea to avoid host checks so you'll want to make them
>  return as fast as possible (using a well-tuned 1-ping check_icmp you can
>  have ir always return within 1 second).
>  - - Event handlers should fork before doing any work.
>  - - Instead of using performance data processing commands you can have
>  nagios write data to a file of fifo. See:
>  http://www.nagiosexchange.org/cgi-bin/page.cgi?g=Detailed%2F2520.html;d=1
>  http://www.control-alt-del.org/code/NPDaemon/
>  - - Instead of using OCSP commands you can use the perfdata file to
>  forward commands. See:
>  http://www.nagioscommunity.org/wiki/index.php/OCP_Daemon
>
>  IF you must use the perf/ocsp commands anyways make sure they fork
>  before doing any work.
>
>  You can also have a look at some other things you can tune:
>  http://nagios.sourceforge.net/docs/2_0/tuning.html
>
>  Thomas
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