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From sebb <seb...@gmail.com>
Subject Re: JMeter perf problems with master/slave setup.
Date Sat, 27 Feb 2010 00:30:09 GMT
On 26/02/2010, doki_pen@doki-pen.org <doki_pen@doki-pen.org> wrote:
> In gmane.comp.jakarta.jmeter.user, you wrote:
>  > In gmane.comp.jakarta.jmeter.user, you wrote:
>  >> On 26/02/2010, Doki Pen <doki_pen@doki-pen.org> wrote:
>  >>> I'm seeing horrible jmeter performance when I run in master slave mode
>  >>>  on EC2 (10pages/sec).  But when I run in normal mode I get great results
>  >>>  (200 pages/sec)
>  >>>
>  >>
>  >> What about the individual response times?
>  >> Are they similar?
>  >>
>  >> Are the tests retrieving identical responses?
>  >>
>  >
>  > In the normal way of the internets, I discovered the solution to my
>  > problem 5 minutes after asking a usergroup.  This, after 2 days of
>  > struggling.   It turns out the magically incantation is as follows:
>  >
>  > # jmeter.properties
>  > mode=Batch
>  > hold_samples=true
>  > num_sample_threshold=1000
>  > time_threshold=30000
>  >
>
>
> After more expirimenting, this isn't really what I want.  hold_samples
>  makes each slave hold all samples in memory until the test is over,
>  usually causing on OutOfMemory error.  num_sample_threshold and
>  time_threshold are what I needed.  But it's a black art setting them,
>  because if they are too small, you get bad perf.  If they are too big,
>  you run out of memory.
>

You could perhaps try the statistical sampling mode.
If that does not have enough detail, then just use independent non-GUI
runs and combine the data after the runs complete.

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