[rrd-users] Trying to do something simple and it ends up being hard:\

[Alex van den Bogaerdt]

----- Original Message ----- 
From: "David OBrien" <dgobrien at gmail.com>
To: <rrd-users at lists.oetiker.ch>
Sent: Wednesday, March 09, 2011 6:13 PM
Subject: [rrd-users] Trying to do something simple and it ends up being 
hard:\


>I created a rrd file using:
[...]
> "DS:queries:COUNTER:60:0:12500000",
> "DS:datain:DERIVE:60:0:12500000",
> "DS:dataout:DERIVE:60:0:12500000",
[...]
> the counter is incrementing and the script runs thru cron once a minute
[...]
> but the graph always says "nan" and no values show up
> I tried with both DERIVE and COUNTER
[...]
> can anyone assist me in figuring this out?

Start by changing the heartbeat into something bigger than 60.
When you say "once a minute", I think it will actually be with a delay of at 
least one minute, together with the processing time of your script it may be 
slightly more than one minute which you do not allow in your rrdtool create.