[rrd-users] Squared graphs
Tobias Oetiker
tobi at oetiker.ch
Wed Jul 4 10:40:11 CEST 2007
Hi Giuseppe,
ther reason for this is the following:
* your RRA intervals are not multiples of eachother, so it is
possible that a lower resolution rra provides better coverage for
the interval you are drawing than the higer resolution rra you
expect to see. RRDtool fetch tries to pick the RRA which provides
the best coverage for the interval you select.
the solution is the following:
* draw your graph not with --end=now but rather with --end=[now-1RRA
interval]
also in recent versions of rrdtool the algorithm for selecting an
rra has been updated slightly to prevent this kind of problem in
some cases.
cheers
tobi
--
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902
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