[Orca-users] Question regarding Statistical Calculations...

[Michael S. Baker]

RRD smooths the data and the smoothing effect is greater the longer the 
period of observation goes.

Michael

Sadat Chowdhury wrote:

>
> We have been using the orca system on a solaris machine and so far we 
> have been able to get the system to gather data and generate html/graphs.
>
> The statistics from the graphs, however, look a bit confusing. Here 
> are some values quoted:
>
> Daily:
> Disk...Max: 3.56
> 1 min avg Process in Run Queue: Max: 5.753
> 5 min avg Process in Run Queue: Max: 4.990
> 15 min avg Process in Run Queue: Max: 4.150
>
> Weekly:
> Disk....Max: 2.13
> 1 min avg Process in Run Queue: Max: 3.901
> 5 min avg Process in Run Queue: Max: 3.966
> 15 min avg Process in Run Queue: Max: 3.966
>
> The statistics generated for daily and weekly are from the same data 
> set. They were both generated at the same time. How come the weekly 
> max values are LOWER than the daily max values, when in fact, one 
> would expect them to be at least the same or higher? For instance, if 
> on Monday the max is 5.753 for any measure, for the entire week, it 
> can't possibly be 3.901 - it has to be at least 5.753 or more (say of 
> the max on Friday was 7.901).
>
> Is there a reasonable explanation? anyone else experienced this?
>
> -Sadat.
>
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