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From Kostas Papadopoulos <kos...@methodosit.com.cy>
Subject Re: GUI getting slower?
Date Tue, 09 Apr 2013 06:56:07 GMT

Only in GUI.  But I think we should not expect absolute consistency between 
JMeter version not even in non-GUI tests. 

On Tue 09 Apr 2013 09:46:55 Philippe Mouawad wrote:
> 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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