check_snmp_load.pl best linux practices

[frank]

On my installation I added code to the SNMP load check to count the CPU 
cores via SNMP and set WARN to 1.25*cores and CRIT to 1.5*cores (for 
any/all load values). Seems to be working ok. Haven't had any complaints 
from the NOC for excessive alerting.

-f

On Wed, 9 Mar 2011, Robert Eden wrote:

> Date: Wed, 09 Mar 2011 14:33:13 -0600
> From: Robert Eden <rmeden at gmail.com>
> Reply-To: Nagios Users List <nagios-users at lists.sourceforge.net>
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] check_snmp_load.pl best linux practices
> 
> I'm currently experimenting with using check_snmp_load.pl to alarm on system overload.
>
> Monitoring CPU usage is giving me a lot of false alarms due to their instantaneous nature.
>
> I'm getting good results by using the NETSL option to report load averages.  I'm setting '-c 99,4,10' to basically ignore the 1 minute value and alarm
> on 5 and 15 minutes.
>
> Unfortunately, unlike the CPU percentages,  the load numbers should be based on the number of processors.  The NETSL option doesn't do that.
>
> One option is to have a series of service commands based on the number of processors, but  I'm considering writing a new mode that will using the
> "STAND" option to get the number of CPUs and then use that as a multiplication factor for alarms.
>
> Does that make sense?   Surely others have run into this problem.  How do you alarm on excessive load w/o causing lots of false alarms.
>
> Robert
>
>
>
>
>
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