[mrtg] Re: Percentage Utilisation ?

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Thu May 31 16:17:31 MEST 2001

Hunt, Chris wrote:

> I've recently looked at deployment of MRTG for coverage of our WAN links'
> throughput. I'm quite impressed so far but my management say that they would
> be happier with seeing a pair of graph lines in the chart that just show
> percentage utilisation.

If you set the unscaled option, you're almost there.  If you also need
the legend for the y-axis to be correct, you can do

current_usage / MaxBytes * 100
which is current_usage / (MaxBytes / 100)

So, for a link with MaxBytes == 1250000, you should be able to
have a target similar to

Target[x]: 1:public at device / 12500

(mind the spaces !!!)

I've heard reports that divisions cause problems in the recent MRTG
release.  I've no personal experience with this so I can't tell for
sure.  You may want to start using RRDtool as the back end, this is
probably enough to solve that problem.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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