[rrd-users] weird behaviour of rrd graph

[Alex van den Bogaerdt]

> also note that recent rrdtool versions have become more 'stable' in
> their choices ... by only looking to the past and not to the
> present since all RRAs by definition cover the present to the best
> of their abilities ...


I'm not sure, but isn't this the same difference?

now-1y will still sometimes be exactly on one RRA boundary, but usually not. 
Just as now does.

I suggest Roland tries to compute current_time - (current_time modulo 21600) 
and use that instead of  "now" to see if that makes a difference. I'm not 
going to bet on it, but it would sure be my first try.

2nd and 3rd try would be 262800 and 2628000 where I wrote 21600.