[mrtg] New Mrtg Server very high CPU usage.

[McDonald, Dan]

On Thu, 2008-08-07 at 16:48 -0500, Mersberger, Robert wrote:
> I have just completed the install of my new Mrtg server on which I am
> running the following 


> for fn in /etc/mrtg/*.cfg; do 
>         env LANG=C /usr/bin/mrtg "$fn" & 
> done 
> ####################################
> 
> I am looking for ways to improve performance  have some cpu left over
> for other task.

560 copies of mrtg running simultaneously?  Not terribly efficient.

I have about 500 devices that I monitor.  I have one master config, with
Include: directives for all of the devices.  I'm running forks: 40.
That runs 40 polling sessions at a time.  Once the polling is done, the
rrd writing is all single-threaded.

What helped us the most was setting up a stripe-set for the rrd files.
With 4 15K rpm sas drives, a 4 member stripe set cut our writing time
from almost 4 minutes to about 40 seconds.




-- 
Daniel J McDonald, CCIE #2495, CISSP #78281, CNX
Austin Energy
http://www.austinenergy.com

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