Increasing latency - over the top - a cry for help

[Marc Powell]

On May 20, 2008, at 4:50 AM, Ståle Askerød Johansen wrote:

>
>
> Hello, oh thou sweet fountain of problem-solving knowledge :-)
>
> Here at the University of Oslo we are running Natios to monitor
> roughly 10k services out of which ~9500 are active. We also monitor
> ~700 hosts. We are running nagios 3.0.1 on a Dell 2850 with 4 Gb of  
> RAM.
> And 4 kernels. We upgraded from 2.9 roughly a month ago.
>
> We have the following problem, and are turning here for help after
> fumbling in darkness for some time: The latency of both host checks
> and service checks increase over time.
>
> After a stop/start of nagios, we see the following pattern:
>
> 1) The service latency starts of at ~2.8 seconds, which we are happy
> with. It increases with about 1 ms per minute, a rough estimate.
> 2) The nagios process starts off at about 17m resident, shown in  
> "top".
> 3) The "system" part of cpu usage starts off at ~30%

I seem to recall this being related to using the embedded perl  
interpreter. Did you compile nagios with ePN? Try without it if you did.

--
Marc
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