Understanding Check Load

[Ryan Bowlby]

----- Original Message ----
> From: "craig at hooters-uk.com" <craig at hooters-uk.com>
> To: nagios-users at lists.sourceforge.net
> Sent: Thursday, August 20, 2009 9:33:39 AM
> Subject: [Nagios-users] Understanding Check Load
> 
> Hi Group, I hope you can give me a better
> understanding of the check_load command as I'm unsure
> what my settings should be aligned to, if you take a
> look at the below command line I get Warning and
> Critical alerts all the time and I'm not sure what to
> alter the figure to as I do not understand them at
> the minute.
> 
> command[check_load]=/usr/local/nagios/libexec/check_load
> -w 15,10,5 -c 30,25,20
> 
> The above line give: WARNING - load average: 3.99,
> 4.56, 7.60
> 
> Looking at the warning and given the fact that the
> server guys says that his server is running OK, what
> would be the ideal -w and -c be to use.
> 
> I will try and read up on the above but just looking
> for help now on this one server.
> 
> Many thanks
> 
> Craig



load average: 3.99, 4.56, 7.60

3.99 is the load on the server for the past 1 minute
4.56 past 5 minutes
7.60 past 15 minutes

-w 15,10,5

Warn me if load is < 15 for the past minute 
or < 10 for the past 5 minutes 
or < 5 for the past 15 minutes

In this case the load is < 5 for the past 15 minutes.

Load is relative to a servers hardware including # of CPUs. So if you trust your server guy then you might want to adjust the check_load thresholds. 

-w 20,15,10      - This would stop the flapping.

Or if you don't trust them you might want to cat /proc/cpuinfo, check service response times and otherwise verify they aren't overloading the server. ;)



      

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