[mrtg] Re: 95th percentile?

[Erik Van Riper]

There is a perl module that I am looking at (Statistics::Descriptive) that
does this type of computation, the issue is mostly how to interpret the data
correctly from the MRTG log files.  I will try to look at this during the
weekend, however I am not a math person so this may take me longer than
others may be able to figure out.

If anyone has ever manipulated the log files generated by MRTG in the past
with perl that could provide some insight, I would be most appreciative.

--
Erik Van Riper
Manager, Network Operations
(619) 302 0698 (Cell)
(619) 623 8400 x112 (Desk)



-----Original Message-----
From: Ken Jones [mailto:kbo at inter7.com]
Sent: Friday, September 24, 1999 9:00 AM
To: George D. Nincehelser
Cc: Pete Templin; David C Prall; mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: 95th percentile?



I am also intereted in 95 percentile graphing for billing purposes.

Has anyone found code to do this?

Ken Jones
Inter7

"George D. Nincehelser" wrote:
> 
> That's exactly what I've been looking for.
> 
> I assume that there is a way an external script can gather the data and
> calculate the 95th percentile,  then pass that info in some way to MRTG so
> it can be graphed?
> 
> I'm unclear as to the best way to graph the 95th percentile data.  I'm
> thinking that a simple straight line across the graph would be sufficient
> for billing purposes, but a trending line might look cool.  I imagine the
> line would best be reset at the end of each billing period.
> 
> Thoughts?
> George
> 
> > -----Original Message-----
> > From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]On
> > Behalf Of Pete Templin
> > Sent: Friday, September 24, 1999 10:04 AM
> > To: David C Prall
> > Cc: mrtg at list.ee.ethz.ch
> > Subject: [mrtg] Re: 95th percentile?
> >
> >
> >
> > On Fri, 24 Sep 1999, David C Prall wrote:
> >
> > > What exactly are you looking for. I just use the WithPeak[]: wmy
option.
> > > This shows the high along with the averages. Giving you four lines
> > > rather then two.
> > >
> > > At some point there was a patch for doing this, but at somepoint I
> > > believe it got converted into the WithPeak option. I have only been
> > > using MRTG for 6 months where I have actually looked beyond the
standard
> > > default configmaker script. And at that point WithPeak was
implemented,
> > > so I used it.
> >
> > Most folks looking for 95th percentile want to be able to calculate the
> > 95th percentile of all of the data over a given time period (usually a
> > month).  MRTG only keeps its five minutes numbers for about two days,
and
> > then it only stores averaged averages.  It's impossible to recreate the
> > true 95th percentile five minute average using reaveraged numbers; the
> > peaks merely show the highest five minute peak across a two hour period.
> > There's no way to determine how many five minute samples were that high.
> >
> > Some people have written scripts that archive a day's worth of
five-minute
> > samples each day, and then crank through that unaveraged data at the end
> > of the month.  The few folks I've talked to about this usually wrote it
on
> > company time, and weren't permitted to release their script.  It's
> > actually not that hard; the challenge is making sure that it scales well
> > (or can be reengineered to scale).
> >
> > Pete
> >
> > --
> > Peter J. Templin, Jr., CCNA
> > Systems and Networks Administrator
> >
> > On-Line Internet Services - URDirect.net
> > A division of Global On-Line Computers
> > 2414 Babcock Rd. Suite 106            templin at urdirect.net
> > San Antonio, TX 78229                 (210)692-9911
> >
> > --
> > * To unsubscribe from the mrtg mailing list, send a message with the
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> >
> >
> 
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