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From Philippe Mouawad <philippe.moua...@gmail.com>
Subject Re: GUI getting slower?
Date Tue, 09 Apr 2013 06:46:55 GMT
Hello,
I think the lesson should be more:
- Use NON GUI mode  for Load Testing

Did you find slowdowns in Non GUI mode with this throughput  or only in GUI
mode ?

Regards
Philippe

On Tue, Apr 9, 2013 at 8:32 AM, Kostas Papadopoulos <
kostas@methodosit.com.cy> wrote:

>
> Hi,
>
> After some more testing, I found this is an issue (at least for me) only
> when
> throughput is high, of the order of 4000 transactions per sec on 25
> threads.
> I don't think it is worth the time to investigate further.
>
> The lesson for me is that to do comparative performance testing you
> shouldn't
> change anything from your baseline, including JMeter versions.
>
> --
> Best Regards
>
> Kostas Papadopoulos
>
> K.E MethodosIT Ltd
>
> Tel: +357 22463610
> Fax: +357 22515197
> Website: http://www.methodosit.com.cy
>
>
> On Thu 04 Apr 2013 17:20:06 Adrian Speteanu wrote:
> > Hi,
> >
> >
> > If you are willing to contribute with tests & results of your own, or if
> > you find a scenario that doesn't work, its safe to say that everyone in
> > the list is interested in reading about it.
> >
> > Cheers.
> >
> >
> >
> >
> >
> > On Wed, Apr 3, 2013 at 4:04 PM, Kostas Papadopoulos <
> >
> > kostas@methodosit.com.cy> wrote:
> > > Hi Philippe,
> > >
> > > Thanks for the response. We have already changed our test practice to
> > > non-GUI
> > > testing so it is not an issue for us. But if anyone needs to
> investigate
> > > this
> > > further I'm willing to help.
> > >
> > > --
> > > Best Regards
> > >
> > > Kostas Papadopoulos
> > >
> > > K.E MethodosIT Ltd
> > >
> > > Tel: +357 22463610
> > > Fax: +357 22515197
> > > Website: http://www.methodosit.com.cy
> > >
> > > On Wed 03 Apr 2013 15:46:12 Philippe Mouawad wrote:
> > > > Hello,
> > > > @Kostas, there is a clear recommandation to do test in NON GUI mode.
> > > > http://jmeter.apache.org/usermanual/best-practices.html
> > > >
> > > > Since 2.5 there has been a lot of fixes on somes GUI issues related
> to
> > > > synchronization problems, they may have incurred some performance
> > > > degradations although I didn't notice them on the few tests I did.
> > > > There has been a Bugzilla opened a while ago and tests didn't show it
> > > > clearly
> > > >
> > > > See:
> > > >    - http://jmeter.apache.org/changes.html
> > > >    - http://jmeter.apache.org/changes_history.html
> > > >
> > > > @Kirk,
> > > > Since 2.5 there has been quite a lot improvements on Memory and
> > > > Performances.
> > > >
> > > > Among this:
> > > >    - fixes on memory leaks
> > > >    - fixes on memory usage by Regexp Extractor which consumed the
> > > >    double of a response size
> > > >    - fixes in core
> > > >
> > > > In 2.9, we introduced a performance improvement that may have
> > > > increased usage of memory which in summary caches the response so
> > > > that it is not converted/parsed as many times as there are post
> > > > processors.
> > > >
> > > > My tests showed an important performance gain if post-processors were
> > >
> > > used
> > >
> > > > which in my opinion is the majority of cases.
> > > >
> > > >
> > > > So at first sight I doubt there is performance degradation between
> 2.5
> > >
> > > and
> > >
> > > > 2.9 but I may be wrong.
> > > >
> > > > Don' t hesitate to open an issue with a sample test plan and as many
> > > > informations as you have
> > > >
> > > >
> > > > Regards
> > > >
> > > > Philippe M.
> > > >
> > > > On Wed, Apr 3, 2013 at 1:44 PM, Kirk Pepperdine
> > > >
> > > > <kirk.pepperdine@gmail.com>wrote:
> > > > > I've noted some significant differences in performance which I'll
> be
> > > > > investigating over the next few days. The first thing I've noted
is
> > > > > a significant increase in memory requirements.
> > > > >
> > > > > -- Kirk
> > > > >
> > > > > On 2013-04-03, at 4:48 AM, Kostas Papadopoulos
> > > > > <kostas@methodosit.com.cy>
> > > > >
> > > > > wrote:
> > > > > > We have been using JMeter version 2.5 to do some performance
> > > > > > testing. I recently installed JMeter version 2.9 and I found
that
> > > > > > the test results
> > > > >
> > > > > for
> > > > >
> > > > > > the same tests are very different when using the GUI. In one
> > >
> > > instance,
> > >
> > > > > the
> > > > >
> > > > > > same test gives throughput 4500/sec with version 2.5 and 3800/sec
> > >
> > > with
> > >
> > > > > 2.9.
> > > > >
> > > > > > Running non-gui on both versions gives comparable results (within
> > >
> > > 2%).
> > >
> > > > > I'm
> > > > >
> > > > > > running these tests on the same exact environment for both
> version
> > > > > > (same machines, application to be tested, java version, database,
> > > > > > data, etc.)
> > > > > >
> > > > > > Is this to be expected? Is the recommended practise to run only
> > > > > > non-gui?
> > > > >
> > > > > Or
> > > > >
> > > > > > is it something to be looked at more carefully?
> > > > > >
> > > > > > Please excuse me if this has this been addressed before.
> > > > > >
> > > > > > --
> > > > > > Best Regards
> > > > > >
> > > > > > Kostas Papadopoulos
> > > > > >
> > > > > > K.E MethodosIT Ltd
> > > > > >
> > > > > > Tel: +357 22463610
> > > > > > Fax: +357 22515197
> > > > > > Website: http://www.methodosit.com.cy
> > > > > >
> > > > > >
> > > > > >
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-- 
Cordialement.
Philippe Mouawad.

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