nagios and apan cause server to crash...

[Fredrik Wänglund]

I your Nagios compiled with embedded Perl?

/FredrikW


Matthew Wilson wrote:

> Hi guys,
> I have read in the list archives in the last couple of months a few 
> threads about nagios and apan chewing up memory.  I have tried a few 
> of the solutions posted but still have no joy.  Here's my situation:
>  
> Hardware - Dell Poweredge PIII 500 w/ 374MB memory, SCSI hard drive
> Software - RedHat 9, Nagios 1.1 (installed from RPM) and apan.  The 
> only other stuff of any signifance running is ssh and httpd (for 
> nagios alone)
>  
> Nagios is checking about 50 service on 50 hosts using apan to ping 
> every 5 mins.  The machine will run for about 5 days and then seize up 
> to point that it requires power cycling.  (This is particular pain as 
> I administer the box remotely ;-) Rebooting will sort it out and after 
> getting nagios going again the same will happen.    Looking at my 
> /var/log/messages, I see the kernel shutting down processes due to a 
> lack of memory.  However, it's not nagios that is shut down but httpd 
> (which normally consumes about 8MB).  It's a little difficult for me 
> to see what's actually happeninng as I look after this machine on a 
> contract remotely, and nobody is watching it 24-7.  Watching free on a 
> daily basis I gradually see free memory decreasing and buffer and 
> cache sizes increasing, (to the point where there is only about 16MB 
> memory free) but I understand this is what linux is supposed to do.  
> My nagios process doesn't apparently grow (or not when the machine is 
> stable) and is normmaly using about 1.5MB.
> Here's what I have tried:
>  
> - Reducing max concurrent checks to 20.  No apparent affect other than 
> giving big check latencies.
> - Daily restart of nagios process via cron job - no apparent affect
>  
> any helping in diagnosing/fixing this much appreciated.  Also please 
> bear in mind that I only learnt linux for this project, so may be 
> missing something obvious ;-)
>  
> cheers
> Matthew Wilson
> DCSat.net





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