[rrd-users] Re: problem with displaying metrics of different ranges

[Serge Maandag]

> I have an RRD that contains several metrics.  The
> value of the metrics is very different in the range,
> i.e., one range is between 1 and 200, and another is
> between 5000 to 20000.  When I plot these 2 metrics on
> the same graph, only one line is readable.  How can I
> plot it so that I can see both values, they do not
> need to be on the same scales.  Once way I was
> thinking of doing is to scale them to below 10, but I
> need to get the MAX, which I do not know how to get...
> Can anyone suggest better methods?

Not really,

you can divide the biggest one by ten and add a comment to
the legend saying you did so. GPRINT the MAX value of the
original value to the legend and use the scaled version
for your LINE.

Something like:

DEF:small=/var/....
DEF:big=/var/....
CDEF:scaled=big,10,/
LINE1:scaled....
LINE1:small....
GPRINT:big....


You can also use a logarithmic y-axis.

Serge.

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