[rrd-users] Re: rrd updates give NaN

Tony Howat arhowat at hotmail.com
Mon Jul 31 20:09:29 MEST 2006

Alex van den Bogaerdt wrote:

>What you are saying is like this in pseudo code:
> > while forever
> > do
> >     run_rrdtool
> >     sleep 60
> > done
>The execution time of this loop is more than 60 seconds.  Say it
>takes 0.1 seconds to 'run_rrdtool'.  If you require the updates to
>be no further apart than 60 seconds, and if you update every 60.1
>seconds, each update will arrive too late.
>I'm not saying this has to be the cause of your problem.  I do say
>something like this is the most likely cause.
>Try changing that 'N' into a real timestamp and then log every update
>command so you can do some analysis.

Feeding time() values in instead of N seems to have done the trick.

Many thanks for your help!


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