[rrd-users] Graphing COUNTER values absolutely

Felix Castillo Sanchez felix.castillo at oraconsult.de
Tue Mar 18 20:26:29 CET 2008

> -----Ursprüngliche Nachricht-----
> Von: rrd-users-bounces at lists.oetiker.ch [mailto:rrd-users-
> bounces at lists.oetiker.ch] Im Auftrag von Simon Hobson
> Gesendet: Dienstag, 18. März 2008 16:59
> An: rrd-users at lists.oetiker.ch
> Betreff: Re: [rrd-users] Graphing COUNTER values absolutely
> Felix Castillo Sanchez wrote:
> >  > I'm trying to graph COUNTER values but not as a rate per second but
> as
> >>  number per defined step (e.g. "changes within 5 minutes").
> >>
> >  > Is there a way how to graph this?
> >If a rate is (e.g.) 10 per second, then it is (e.g.) 3000 per 5 minutes.
> >but what if rrdtool is using RRAs where data is aggregated?
> Then you'll get aggregated values ! You can't graph data that you
> haven't got, so if you have aggregated the data then the results will
> be from the aggregated data. Note that RRD **ALWAYS** normalises and
> aggregates data - but if you are careful enough then you can make
> this into a null operation.
> What is it that you are trying to do, and what isn't rrdtool doing for you
> ?
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I'm storing Oracle performance values that are continuously increasing. The
problem is that a user cannot handle a per second rate because we're talking
about centiseconds within 5 minutes. So how do I explain an end user that
sub-microseconds of wait time can be a performance bottleneck?!

So if I get aggregated values I cannot multiply by the default step - I've
to take whatever the RRAs interval is - right?



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