[Xymon] rrddefinitons.cfg - how to modify the default step in RRA

[Nico]

Hi

I need to do a temporarily graph with a very low frequency : 5 seconds instead of the regular 300 seconds.

1/ On client side, the external script is simple:

[ buda ext]# cat httpd_threads.sh 
#!/bin/bash
THREADS_HTTP=`ps -ef | grep -c [h]ttpd`
LINE="data $MACHINE.trends
[httpd_threads.rrd]
DS:threads:GAUGE:5:U:U $THREADS_HTTP"
$BB $BBDISP "$LINE"

So, as you can see, the step is 5 in the DS.

clientlaunch.cfg has "INTERVAL 5s".

2/ On Xymon server side : 

rrddefinitions.cfg  :

# step = 5 seconds
[httpd_threads/5]
        # 576 * 60 * 5 sec = 48 h soit 2 jours sans perte
        RRA:AVERAGE:0.5:60:576
        RRA:AVERAGE:0.5:360:576
        RRA:AVERAGE:0.5:1440:576
        RRA:AVERAGE:0.5:17280:576


# This one is the default setup. You can change it, if you like.
[]
        # 576 datapoints w/ 5 minute interval = 48 hours @ 5 min avg.
        RRA:AVERAGE:0.5:1:576
        # 576 datapoints w/ 6*5 minute averaged = 12 days @ 30 min avg.
        RRA:AVERAGE:0.5:6:576
        # 576 datapoints w/ 24*5 minute averaged = 48 days @ 2 hour avg.
        RRA:AVERAGE:0.5:24:576
        # 576 datapoints w/ 288*5 minute averaged = 576 days @ 1 day avg.
        RRA:AVERAGE:0.5:288:576



3/ RRD created:

here the issue, the step is still 300. The minimal_heartbeat is 5.

rrdtool dump httpd_threads.rrd


<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE rrd SYSTEM "http://oss.oetiker.ch/rrdtool/rrdtool.dtd">
<!-- Round Robin Database Dump -->
<rrd>
        <version>0003</version>
        <step>300</step> <!-- Seconds -->
        <lastupdate>1360264485</lastupdate> <!-- 2013-02-07 20:14:45 CET -->

        <ds>
                <name> threads </name>
                <type> GAUGE </type>
                <minimal_heartbeat>5</minimal_heartbeat

--- snip ---


How can i change the step to 5 instead of 300 ?

Thanks for your help.


Cheers
Nico

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