[rrd-users] Re: Two independent Y-axis scales

Hugo van der Kooij hvdkooij at vanderkooij.org
Fri Oct 29 09:17:31 MEST 2004


On Thu, 28 Oct 2004, Robert Nelson wrote:

> I am using RRDTool with Nagios and am tracking some info on radios. One
> the values is RSSI, which can range from 0 to 2500. The other is jitter,
> which has a range of 0 to 15. I'd like to make two Y-axis scales, Blue
> from 0 to 2500 and Green from 0 to 15, with the appropriate colored
> lines for the values. As it is, the jitter just shows as a solid green
> line on the bottom of the chart, so it's really hard to tell if it's
> varying at all.
>
> I can do this as multiple charts, but it would be really nice to view
> all this stuff in one place. We've used other tools that do this in the
> past and it works great, since both lines really should be a solid
> horizontal line (should be...). I looked through the archive and saw a
> September 2003 post suggesting someone might be working on this, but
> there was no followup that I could find.

The quick workaround is to multiply the Greens with 2500/15 = 167 for the
graphs. Use the orginal value for the text values below the graph.

Hugo.

-- 
	I hate duplicates. Just reply to the relevant mailinglist.
	hvdkooij at vanderkooij.org		http://hvdkooij.xs4all.nl/
		Don't meddle in the affairs of magicians,
		for they are subtle and quick to anger.

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