[mrtg] Re: Eliminating Spikes on Graphs

Peter Glanville peter_glanville at cuk.canon.co.uk
Fri Sep 12 18:47:36 MEST 2003

> I'm using MRTG with RRDTool, and I've successfully recorded about 8 weeks
> worth of data. On my weekly graph, 4 weeks ago, I have an anomaly - a
> spike, whilst all other traffic during the entire time period never
> 3Mb (because it's a 3Mb line that the interface is connected to).
> Is there a way of scrubbing the graph so that the scale isn't all out of
> whack? I have tiny little bumps all the way through and a skinny spike 4
> weeks ago. Needless to say, this affects the yearly graph also.
> Thanks.

Killspike.pl (I think I googled for it)

Very effective if a box reboots and MRTG does not realise that the counter
change is caused by a reboot and not a counter wrap, which occasionally
happens for me.

If you're using Windozes, some simple tweaks, and an old copy (1.0.33) of
RRD needed.


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