Xymon Mailing List Archive search

Custom graph interval

list Henrik Størner
Fri, 11 Nov 2011 09:10:53 +0100
Message-Id: <user-3b5bc222e091@xymon.invalid>

On 11-11-2011 01:06, Ger Maguire wrote:
Hi, I have a custom script that is working fine and graphing with no
problems when I have the test launch interval set to 5m but if I change
this to 10 or 15m then the graph stops updating,
This is due to the way that the rrd-files are created. An rrd file has a "step" setting telling RRD what the normal update-interval is for the graph; if updates don't arrive with the expected interval, it will consider the data to be stale/invalid and not show any graphs.

The default for RRD-files generated by Xymon is to get updates in 5 minute intervals.

To fix this you should define the RRD in the "rrddefinitions.cfg" file and specify a different update interval. If you update it once every 15 minutes = 900 seconds, then you can copy most of the default setup in that file, and just change the interval. Like this:

[sfap/900]
         RRA:AVERAGE:0.5:1:576
         RRA:AVERAGE:0.5:6:576
         RRA:AVERAGE:0.5:24:576
         RRA:AVERAGE:0.5:288:576

Note that this is only used when the rrdfile is created - it cannot be changed later. So you will have to delete your current sfap.rrd files and have Xymon re-create them with the new "step" value. You can use the command "rrdtool info ~xymon/data/rrd/HOSTNAME/sfap.rrd" to see what the step value is.


Regards,
Henrik