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Old 29-05-2010, 01:37
lamont lamont is offline
Join Date: Nov 2007
Location: Seattle, WA
Posts: 87
Default Misleading Percentiles

I just noticed that zabbix appears to report the percentiles on a given graph after it is done processing it.

So, if you have highly sampled data that you're displaying with 'max' you will get the percentile of the maxes.

I'd consider that almost useless and misleading and never what I'd really want (at least I can't consider of a case where I want that).

What I expected to get was the 95th percentile of the raw data, and then to get a graph of the data with the max values per minute. The 95th percentile of the graphed data was not useful.

I would suggest applying the percentile computation before munging the data for the graphing and not after munging it.
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