[rrd-users] values being averaged.

Fabien Wernli wernli at in2p3.fr
Thu Jan 17 17:55:40 CET 2008


On Thu, Jan 17, 2008 at 06:18:55PM +0200, Richard.W.Brown at nokia.com wrote:
> My biggest assumption was that the documentation was correct, this seems
> to be incorrect, as the tutorial rrd_beginners
> http://oss.oetiker.ch/rrdtool/tut/rrd-beginners.en.html states quiet
> clearly:
> "GAUGE does not save the rate of change. It saves the actual value
> itself. There are no divisions or calculations."

It's funny we had a big discussion with a collegue yesterday, and he
misunderstood this quote just like you.

By "actual value" the documentation doesn't mean "exact value" but "absolute
value" as opposed to "rate of change".

GAUGE   => rrdtool stores "actual value"
COUNTER => rrdtool stores "rate of change" i.e. derivative

but both will be consolidated, averaged, whatever

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