> every night the yearly graph is generated and looks ok: > http://umweltsuen.de/tmp/power-1y-ok.png > > there is only one exception: > from time to time, the resolution of the graph changes, and it looks like > this: > http://umweltsuen.de/tmp/power-1y-wrong.png > (this happened twice now, after more than 1 1/2 months without problems)
> maybe someone has an explanation, what`s causing this effect and how to > avoid it ? Yeah, it has to do with resolution, with availability of data, with the best match on what you ask, not what you want to ask, but actually do ask. RRDtool has a choice which RRA to use, and it chooses one you don't like. But for some reason that RRA is actually a closer match to what you ask than the other which is used in all other cases. To avoid: determine from which RRA you want the data to be displayed. Set your end time to a time which is on a boundary, a whole multiple of step*steps, a duration of a CDP. HTH Alex _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
