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Custom graph interval

2 messages in this thread

list Ger Maguire · Fri, 11 Nov 2011 00:06:11 +0000 · 
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, attached below is my graphs.cfg entry. Can someone assist me in the correct setting I need to look at for changing this correctly to update at 10 or 15 minute intervals ?

Thanks.

[sfap]
                TITLE fap utilisation
                YAXIS %
                DEF:hsfapgdef=sfap.rrd:hsfapg:AVERAGE
                DEF:msfapgdef=sfap.rrd:msfapg:AVERAGE
                LINE2:hsfapgdef#00CCCC:hourly fap
                LINE2:msfapgdef#FF0000:monthly fap
                COMMENT:\n
                GPRINT:hsfapgdef:LAST:hourly fap \: %3.1lf (cur)
                GPRINT:hsfapgdef:MAX: \: %3.1lf (max)
                GPRINT:hsfapgdef:MIN: \: %3.1lf (min)
                GPRINT:hsfapgdef:AVERAGE: \: %3.1lf (avg)\n
                GPRINT:msfapgdef:LAST:monthly fap  \: %3.1lf (cur)
                GPRINT:msfapgdef:MAX: \: %3.1lf (max)
                GPRINT:msfapgdef:MIN: \: %3.1lf (min)
                GPRINT:msfapgdef:AVERAGE: \: %3.1lf (avg)\n
list Henrik Størner · Fri, 11 Nov 2011 09:10:53 +0100 ·
▸ quoted from Ger Maguire
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