[rrd-users] Re: Perl RRD graphing rounding error

Serge Maandag serge.maandag at staff.zeelandnet.nl
Sat Nov 6 01:29:56 MET 2004

> We use RRDs::graph (1.000491) with the following parameters:
> -s -1182833
> -e -42232
> The problem is that for certain intervals, even though every 
> sample has 100's throughout, we get a number slightly less 
> than 100 as the average of B1.

Perhaps it has something to do with your start and end times not being N
times stepsize.
It may use half of an interval, nan in the first case and zero in the

Try something like $start = int( (time() - 1182833) / 300) ) * 300
Same for $end..

Just a guess..

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