Nagios performance and delayed checks

[kyle.odonnell at gmail.com]

Hi Kyle,

I used the nagios tuning guide:

http://nagios.sourceforge.net/docs/2_0/tuning.html

I've also had some success with lowering the 'service_reaper_frequency'

I've also found that lowering the host and service timeouts to be useful.


--kyleo

On 9/6/07, kyle <kyle at caosdigital.com> wrote:
>
> Hi folks,
>
> I'm having some performance issues with a rather big Nagios 2.4 deployment
> (430
> servers, 3000 service checks) .
>
> I'm having now a 600-900 secs avg latency for checks - checks distribution
> is more or less like this :
>
>  450 check_icmp 	(scheduled every minute)
>  500 check_ifoperstatus (scheduled very 5 minutes)
>  800 check_nt 		(scheduled every 5-10 minutes)
>  200 check_http 	(scheduled every 5 minutes)
> 1000 check_by_ssh 	(scheduled every 5-10 minutes)
>
> 1730 Performance graphs generated by PNP
>
> I've already applied some performance tips specified in the nagios faq
> (aggregated status updates, max_concurrent_checks=0, checked hardware
> config, etc)
>
> Since load average for this server is always below 1, is there any way to
> force more concurrent checks per second? (btw, I've replicated the same
> config in a similar server with a Nagios 2.9 setup and ended with similar
> results as well)
>
> Thanks in advance :-)
>
>
> ---
>
> Output of nagiostat:
>
> Active Service Latency:               590.886 / 671.695 / 635.054 %
> Active Service Execution Time:        0.124 / 19.130 / 0.483 sec
> Active Service State Change:          0.000 / 49.930 / 0.238 %
> Active Services Last 1/5/15/60 min:   61 / 673 / 2150 / 2929
>
>
>
> Output of nagios -s nagios.cfg :
>
> HOST SCHEDULING INFORMATION
> ---------------------------
> Total hosts:                     424
> Total scheduled hosts:           0
> Host inter-check delay method:   SMART
> Average host check interval:     0.00 sec
> Host inter-check delay:          0.00 sec
> Max host check spread:           30 min
> First scheduled check:           N/A
> Last scheduled check:            N/A
>
>
> SERVICE SCHEDULING INFORMATION
> -------------------------------
> Total services:                     2929
> Total scheduled services:           2929
> Service inter-check delay method:   SMART
> Average service check interval:     433.36 sec
> Inter-check delay:                  0.15 sec
> Interleave factor method:           SMART
> Average services per host:          6.91
> Service interleave factor:          7
> Max service check spread:           30 min
> First scheduled check:              Thu Sep  6 11:18:31 2007
> Last scheduled check:               Thu Sep  6 11:25:45 2007
>
>
>
>
>
> --
> Windows macht frei!
>
>
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