[rrd-users] Re: Interpreting RRD output - Maximum

[Alex van den Bogaerdt]

Lyle Brooks wrote:

> I'm getting acquainted with RRDtool and have started to do
> some data collection and graphing.  In doing so, I've come 
> across some areas where I'm not understanding the results.

> Inititively, I would think that "maximum" on the 5 day graph would
> include this "maximum" found on the 24hour graph.

You need to brush up on consolidation.

You are consolidating averages.  The average of (1,2,3,4,5) is 3.
max(1,2,3,4,5) is 5 while max(avg(1,2,3,4,5)) is 3.

You need more RRAs.  They should keep the maxima.  When you're
going to plot and/or print maxima, use those RRAs.

HTH
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