▸ quoted from Gregory Wege
In <user-dca2d91ed614@xymon.invalid> "Gregory Wege" <user-8392a71e1a00@xymon.invalid> writes:
I'm completing a performance analysis of several servers. In doing this
I'm seeing inconsistency in the scales in the various charts displayed
in Hobbit when viewed for different time periods. For example one of my
web servers had a performance spike, this spiked was picked up in the 24
hour graph, but not the 12 hour. Is there anything that can be done to
remedy these scales?
This is a feature of the way RRD works - data is always averaged over
a period of time. Each of the four datasets contain 576 datapoints, so
the 48-hour graph averages data over (48 hours / 576) = 5 minutes - this
happens to be the same as the polling interval, so the 48-hour graph
will show individual measurements.
However, the 12-day graph (I assume that's the one you're referring to)
still has only 576 datapoints, so each of these is an average over a
30-minute period. This will obviously flatten out brief spikes in your
observations.
Regards,
Henrik