[rrd-users] Re: Calculating a 5%-rule

David Gabler dgabler at TRUELINK.com
Thu Feb 14 17:53:11 MET 2002

I have done this.  

It is really called 95th Percentile

The psudocode is to
rrdtool fetch all the data for the past 30 days.
figure out how many data points you have
pop off the top 5%
pop off the top# and there you go.  that is your 95th Percentile.


> -----Original Message-----
> From: Geert van der Ploeg [mailto:geert at triple-it.nl]
> Sent: Thursday, February 14, 2002 8:46 AM
> To: rrd-users at list.ee.ethz.ch
> Subject: [rrd-users] Calculating a 5%-rule
> Hi all,
> I'm implementing a sort of bandwidth-usage billing system, 
> using RRDtool.
> <short mode>
> How to calculate what value is the highest, after ignoring 
> the highest 5% ?
> </short mode>

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