big performance issue with Nagios 2.5

[Daniel Meyer]

Hi everyone,

i've ran into a somewhat anoying issue with nagios. First, this is my 
setup:

- Dual Xeon 2.8 HT server running an up to date CentOS 4.4, nagios 2.5 
(rpm from Dag Wieers) and checking approx. 285 hosts and 1500 services
- active host checks are off
- host check is replaced by a dummy shell script which just says "ok"
- approx. 15 services are critical, another 15 warning.

So, whats the issue? When i came back into the office this morning i found 
nagios having a service check latency of about 350 sec (maximum and also 
average). I've had this last week to, and its "fixed" by simply restarting 
the nagios daemon.

I've set up some performance monitoring of nagios and the general linux 
system, and this is what i see:

- The load goes up to 2-2.5 within 12h of nagios running (not the peaks, 
but the 15 minute average)
- nagios runs fine for about 15-18 hours (not general numbers, but what 
happened this weekend)
- no unusual notifications over the whole weekend

Any ideas where to look?
-- 
Q: Gentoo is too hard to install      =        http://www.cyberdelia.de
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A: Please see /dev/null.              =
       (from the gentoo installer FAQ) =                             \o/

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