PNP performance

Hendrik Baecker andurin at process-zero.de
Fri Feb 6 20:56:54 CET 2009


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Max schrieb:
> Hi Michael,
> 
> I write about how the team I am on at Comcast  implemented PNP to
> scale well on my blog.  In a nutshell:
> * Use modpnpsender.c on your Nagios master (we added in fork() code so
> that Nagios doesn't pause while modpnpsender sends events .. will be
> releasing that code as a patch soon).  Have modpnpsender send records
> to a second host.

That's a thing that an eventbroker module never should do. Think about
what a fork() does...

> * Set up NPCD on the second host.
> * Use a small xinetd script to write out PNP records to the NPCD queue
> (we will be releasing the one we have in place as well soon).
> 
It would be nice if you can submit it against the latest pnp code and on
the pnp4nagios-devel list.

> We trend on almost 6000 services (~ 1200 hosts) every 5 minutes (runs
> take about 4 minutes right now to trend on all services).  This set up
> works very well for us and has kept the I/O wait load reasonable on
> the report server as well as load average.  
Same thing on my side. ~6000 Services, don't know exactly how many of
them don't support performancedata, but I have <10 seconds avg latency
in Nagios while running all pnp stuff on the same server.
Will say: I can't see a problem for nagios, except of massiv IO load for
the system.

Regards,
Hendrik
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