In <AANLkTi=UHCRZ=user-00d3dbaad4bf@xymon.invalid> Steve Holmes <user-ec1bf77b1b44@xymon.invalid> writes:
It's because at longer history the values are averaged over longer time
intervals.
It would seem that is what is happening, but is that appropriate for things
like CPU values? 100% of the CPU is constant over time. And it looks like
when he takes a certain path to zoom in, he sees expected values.
When you look at a graph, rrdtool will automatically decide which of the
4 datasets it is going to use - the 48-hour set, the 12-day set etc. -
based on what timeperiod you are looking at. So if you start with the
12-day set but zoom into a period within the past 48-hours, then it
will automatically switch from using the 12-day averaged set to the
higher-precision 48-hour set - that's why you then see the peak just
like you do on the 48-hour graph.
Wait a couple of days, and when you zoom in on the same peak, it
won't be as high as it was today.
Regards,
Henrik