[mrtg] Re: Spikes in MRTG graphs and logs...

[Schuyler Bishop]

Interestingly enough, I've found that the spikes are caused by using an
config created by an old version of cfgmaker, and running with the latest
version of MRTG.  When I create a config for the same router, and run it in
parallel with the older-cfgmaker-created-version (same version of MRTG), the
newer-cfgmaker-created config shows no spike.

Sounds like a little incompatibility between configs.

Schuyler

-----Original Message-----
From: Schuyler Bishop [mailto:SBishop at e-xpedient.com]
Sent: Wednesday, May 09, 2001 10:14 AM
To: 'Pavel Ruzicka'; mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Spikes in MRTG graphs and logs...



I've been having the EXACT same problems!  We're running MRTG on a few Cisco
6509s and 7206s, and we have these spikes that last for, at most, a single
polling interval (5 minutes).  I should also note that we have ONLY seen
this behavior since we upgraded to 2.9.10 from 2.8.12.

Since one of the main reasons we're monitoring these circuits is to see if
utilization peaks, it doesn't do us any good to get rid of all spikes... :)

Has anyone nailed-down the cause of these spikes?  It seems like it might be
due to the MRTG box being unable to contact the router, but I can't prove
it...

Thanks,

Schuyler

-----Original Message-----
From: Pavel Ruzicka [mailto:pavouk at k332.feld.cvut.cz]
Sent: Thursday, May 03, 2001 5:50 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Spikes in MRTG graphs and logs...



> Im getting some very disturbing spikes in my MRTG graphs.  (mrtg-2.9.10)
> If I cannot figure out what is wrong with MRTG and the occasional graphing
> of spikes, I will need to manually "fix" those spikes.  See below.

I have similar problem with spikes. Sometimes, when I make new configuration
and mrtg runs simultaneously.

> use Matt Petach's very cool fix_bad_mrtg_logs.pl script to do the actual
log
> file fixing

Where I can get fix_bad_mrtg_logs.pl script?
I don't find him in contrib...

Pavel Ruzicka


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