[mrtg] Re: MRTG optimization and maximal 5 minute polls

[Dan Wentzel]

Lisa,

	This is just a guess as I've only been using MRTG for a short time, but
I would surmise that the 'long pole in the tent' on this process is the time it takes
for the information to be gathered by your multiple switches.  MRTG and rateup
are probably twiddling their thumbs waiting for the data to get back to them.  You
are simply asking for a *lot* of stuff from these switches.
	Maybe it would help to break up your cfg files even more.  I'm going to be 
monitoring our 7 switches (and more to come), but I'm considering breaking down the cfg's to EACH
card on the switch and maximizing the 'parallelism' that this would give me....  You
might try this as well.

	I wish there were any easier way to confirm that it's the delay in request/response
time from those devices.  If you could feed already collected data into MRTG through
a file (to try and benchmark the performance), that would help....  Maybe someone
has done this?

DJW

-----Original Message-----
From:	lfiddler at us.ibm.com [SMTP:lfiddler at us.ibm.com]
Sent:	Friday, February 04, 2000 9:46 PM
To:	mrtg at list.ee.ethz.ch
Subject:	[mrtg] MRTG optimization and maximal 5 minute polls



I am running MRTG on a 43P AIX 4.3.2 box and can not seem to get the
polling to fall under 5 minutes.  I need to collect at 5 minute intervals,
but it doesn't finish in enough time.  I have tried breaking up the cfg
file and running multiple processes, but this only brought me to a polling
and rateup finish time of 7 minutes.  I have some AIX people working on
tweaking the box, but I wondered if there was a way to optimize MRTG on the
software side to solve this issue.  I am polling about 17 switches with
25-50 interfaces and I realize that this is a lot of device information,
but a 43P surely can handle this.  We had it on an NT box originally efore
that finished in 7 minutes and I know this box is WAY faster.  Anyone run
into this problem and solve it on the software end with MRTG or is there
tweak AIX that could speed it up??

Thanks in advance for any advice....

Lisa Fiddler
IBM Global Services
Network Measurements -- Commercial Internet Team
5600 N. 63rd Street, Mail Stop 024x
Boulder, Colorado  80314

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