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From Felix Schumacher <felix.schumac...@internetallee.de>
Subject Re: Use of https://github.com/HdrHistogram/HdrHistogram
Date Fri, 30 Mar 2018 10:28:52 GMT
Sorry for the late answer.

As https://bz.apache.org/bugzilla/show_bug.cgi?id=61725 is yet another
report for the same "bug" and HdrHistogram seems to be a good
compromise on memory, speed and accuracy, I think we should go that
way.

HdrHistogram is available under BSD clause 2, so it should be safe to
include.

As a side effect I am dreaming of a mini-histogram in the visualizer
for every request line :)

Felix

Am Dienstag, den 21.11.2017, 14:33 +0530 schrieb Isuru Perera:
> +1 for using HdrHistogram. We found out that the percentiles values
> shown
> in "Aggregate Report" and the web dashboard are different for the
> same JTL
> file. It will be good if we can use the same logic to calculate
> percentile
> values in JMeter listeners and the web dashboard.
> 
> On Sat, May 20, 2017 at 7:58 PM, Philippe Mouawad <
> philippe.mouawad@gmail.com> wrote:
> 
> > 
> > Hello,
> > Any other thoughts ?
> > 
> > Thanks
> > 
> > On Saturday, May 6, 2017, Antonio Gomes Rodrigues <ra0077@gmail.com
> > >
> > wrote:
> > 
> > > 
> > > +1
> > > 
> > > 2017-05-06 15:57 GMT+02:00 Maxime Chassagneux <
> > > maxime.chassagneux@gmail.com <javascript:;>>
> > > :
> > > 
> > > > 
> > > > +1 : lgtm
> > > > 
> > > > 2017-05-06 15:41 GMT+02:00 Philippe Mouawad <
> > > p.mouawad@ubik-ingenierie.com <javascript:;>
> > > > 
> > > > > 
> > > > > :
> > > > > 
> > > > > Hello,
> > > > > A user recently reported a bug on StatCalculator class:
> > > > > 
> > > > >    - https://bz.apache.org/bugzilla/show_bug.cgi?id=61071
> > > > > 
> > > > > It appears issue is not restrained to Median but
> > > > > concerns  percentile
> > > > > computing.
> > > > > 
> > > > > Besides, this class has many drawbacks:
> > > > > 
> > > > >    - It is not tested as much as it should be
> > > > >    - It relies on an algorithm that consumes memory
> > > > > 
> > > > > We use another class in Web/Dashboard report and
> > > > > BackendListener
> > client
> > > 
> > > > 
> > > > > 
> > > > > implementations that relies on commons-math
> > > > > org.apache.commons.math3.stat.descriptive.DescriptiveStatisti
> > > > > cs.
> > > > > 
> > > > > My proposal is the following:
> > > > > 
> > > > >    - First step : Introduce in StatCalculator, HdrHistogram
> > > > >    - Second step : Replace DescriptiveStatistics by
> > > > > HdrHistogram
> > > > > 
> > > > > 
> > > > > Benefits:
> > > > > 
> > > > >    - Uniform computing accross JMeter
> > > > >    - Better performances
> > > > > 
> > > > > Are you ok with this approach ?
> > > > > 
> > > > > Thanks
> > > > > --
> > > > > Regards.
> > > > > Philippe Mouawad.
> > > > > Ubik-Ingénierie
> > > > > 
> > 
> > --
> > Cordialement.
> > Philippe Mouawad.
> > 
> 
> 

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