jmeter-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Philippe Mouawad <philippe.moua...@gmail.com>
Subject Re: Understanding Hits per second
Date Thu, 03 Oct 2013 14:02:35 GMT
Hello Kirk,
In this case , the question was can 10 Threads generate 21 req/s ? Do you
agree that it is quite possible ?
User was not saying he had a variation.
I understand Coordinated Omission (and thanks for your contribution to
this) but I am not sure it's the case here , or do I misunderstand ?

Thanks


On Thu, Oct 3, 2013 at 3:58 PM, Kirk Pepperdine
<kirk.pepperdine@gmail.com>wrote:

> Hi all,
>
> Jumping in on this thread late but (very bluntly) if your test harness
> throughput is dependent upon the response time of your application, you
> test system is broken. This is one of the conditions that we've recently
> named coordinated omission (CO). It is a state where the test harness and
> the server (accidentally or unintentionally) collaborate to miss injecting
> samples when they should have been injected. The net result is that the
> harness backs off allowing the server to drain and that in turn allows your
> server to report on numbers that are much better than they would be in
> reality. From a performance testing point of view, the reduced load is akin
> to a scale down study of your system. Scale down studies often produce
> different results than testing at scale. It is but one of the many ways
> UATs fail to recognize problems that leak out into prod but it's an
> important one.
>
> How to fix this? For starters, always set the loop count for a thread to
> 1. Set the number of threads to the number of transactions you want to run
> and then set the warmup time to the duration of the test. This won't fix
> all of the problems that come with using JMeter but it gets rid of one of
> the bigger problems. BTW, all of the other tools in the space suffer from
> the exact same issues.
>
> Regards,
> Kirk
>
>
> On 2013-10-02, at 9:05 PM, Philippe Mouawad <philippe.mouawad@gmail.com>
> wrote:
>
> > Hello,
> > Of course you can generate even much more than 21req / s.
> > If fully depends on your response times.
> >
> > Want to test:
> > - Create a mirror server listening on 8081
> > - Create an HTTP Sampler hitting localhost:8081
> > - Add only an aggregate report
> >
> >
> > Running on a last generation Mac Book Pro with default configuration =>
> 517
> > req/s .
> >
> > This test is stupid but just to confirm you can hit this rate.
> > The results you mention are strange and I think wrong.
> >
> > Regards
> > Philippe
> > @philmdot
> >
> >
> >
> >
> >
> > On Wed, Oct 2, 2013 at 12:47 PM, bobMeliev
> > <b.meliev@gmail.com<javascript:_e({}, 'cvml', 'b.meliev@gmail.com');>
> >> wrote:
> >
> >> Nope. Even by default Dummy Sampler couldn't generate such load.
> Screenshot
> >> attached.
> >>
> >> <http://jmeter.512774.n5.nabble.com/file/n5718286/screenshot_233.png>
> >>
> >> 21 req/s is huge load just for 10 users. Check this report
> >>
> >>
> http://blazemeter.com/blog/increasing-productivity-wordpress-site-when-using-blazemeter-its-easy-task
> >> with 300 users generated only 5 req/s load and with such load CPU was
> 75%
> >> busy.
> >>
> >>
> >>
> >>
> >> --
> >> View this message in context:
> >>
> http://jmeter.512774.n5.nabble.com/Understanding-Hits-per-second-tp5718263p5718286.html
> >> Sent from the JMeter - User mailing list archive at Nabble.com.
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: user-unsubscribe@jmeter.apache.org<javascript:_e({},
> 'cvml', 'user-unsubscribe@jmeter.apache.org');>
> >> For additional commands, e-mail: user-help@jmeter.apache.org<javascript:_e({},
> 'cvml', 'user-help@jmeter.apache.org');>
> >>
> >>
> >
> >
> > --
> > Cordialement.
> > Philippe Mouawad.
> >
> >
> >
> >
> > --
> > Cordialement.
> > Philippe Mouawad.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@jmeter.apache.org
> For additional commands, e-mail: user-help@jmeter.apache.org
>
>


-- 
Cordialement.
Philippe Mouawad.

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message