[rrd-users] Re: RRA: Dayly and weekly graphs

[Ciaran Deignan]

>Yesterday the dayly graphic showed a peak of 1.12Mbps around 10 a.m 
>(GMT-06), but the weekly graphic showed that peak in 586Kbps.
>  
>

How many pixels were there in the graph?
RRD calculates the period of time corresponding to each pixel, and
than calculates the average value for that period.

Tru, your daily graph shows a higher peak. But over a small period. But
if you had an even smaller period to look at , it would be even higher.
For example in a CPU, for exch CPU cycly the CPU is either fully useful
or fully incative - but graphing just the max value for that sort of 
resolution would
be useless... So RRD does the intelligent thing - its just not what 
people expect ;)

Have fun,
Ciaran

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