There are two important things about RRD files you should understand, STEP and HEARTBEAT. Step is the interval that the data comes in.
Heartbeat is the interval in which if data doesn't come in, the data is thrown out. As mentioned, Xymon has a 10 minute heartbeat, so if it doesn't get data at most every 10 minutes, all data it gets is disregarded. This is why your 10 minute interval is not showing data (if you set a 10 minute interval, and let it run for a long time, you probably will find a few reports that graph due to timing).

If you have a 10+ minute interval on built in graphs, you are going to have to retune the rrds as Henrik already pointed out. This will have to be done in a test by test, host by host manner. If you have a lot of tests and/or hosts, you would be wise to write a script and utilize the "xymongrep" utility.

With that said, if it is a custom graph, you can configure the RRD heartbeat in xymonserver.cfg in your NCV definition. The Xymon documentation shows that you define your NCV with the data set name and the data set type, but you can overload those parameters further with the heartbeat, min val and max val.

Example: NCV_QueueDepth="depth:GAUGE" becomes: NCV_QueueDepth="depth:GAUGE:1200:O:U"

This creates a RRD data set named "depth" of type "GAUGE" with a heartbeat of 1200 seconds, a minimum value of 0 and an unlimited maximum value. As a note, you would probably always want to have a heartbeat of AT LEAST double the interval you are testing.

Then, you can change the step parameter in rrddefinitions.cfg by adding a -s parameter: [QueueDepth] -s 600 RRA:AVERAGE:0.5:1:576

Michael Beatty Sherwin-Williams IT Analyst/Developer michael.beatty at sherwin.com 216-515-7374

On 06/21/2013 06:10 AM, henrik at hswn.dk wrote:

Den 21.06.2013 09:02, deepak deore skrev:

...

__If i make the "INTERVAL 10" to a custom sctipt clientlaunch.cfg on client side. Then graph doesnt show any data. But it worked below 5 minutes interval.

How can I make this work if INTERVAL is set to > 10.

The default RRD graph definitions assume updates happen with <600 second intervals (the so-called "heartbeat"). If you don't update that often, then you must define the RRD-file differently. You can use the "rrdtune" command to change the heartbeat setting.

Xymon can be configured to create rrd-files with a different heartbeat

• in the "rrddefinitions.cfg" file - but this only applies to new RRD files that Xymon created, it doesn't affect existing ones.

Regards, Henrik

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