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Date: Thu, 5 Nov 2009 23:13:54 -0800
Message-ID: <4483c26c0911052313k33c9f1a5p6f9c8cdcb31312a2@mail.gmail.com>
Subject: Re: Performance Test Setup for a web site...
From: Deepak Shetty <shettyd@gmail.com>
To: JMeter Users List <jmeter-user@jakarta.apache.org>
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>I will create Scripts which will hit the site pages proportional to there
usage
This isnt easy.

>- What should be the configuration of the machine which will simulate these
>- If more then one test machine is required please specify there
configuration?
>- How many instances of jMeter we need to run for simulating 5000 users?
My preference is Multiple low end machines running separate JMeter instances
to 1 big machine. It simulates the network better . The load you can
generate depends on what else is running and what your tests actually do.
People have reported running 1000 threads from a single machine. In any case
, you must generate a load and check your client machine resources ,
preferably the cpu shouldn't exceed 60-80% and memory used should all be RAM
not virtual. You can increase the number of threads till you hit some limit
after which the client machine may become a bottleneck and give you
incorrect results.
See related
http://wiki.apache.org/jakarta-jmeter/HowManyThreads
http://jakarta.apache.org/jmeter/usermanual/best-practices.html#lean_mean
When running multiple jmeter instances you can either run each instance
separately (my preference) or you can run Jmeter  in master slave (this is
more inefficient , check the mail archives).

>How the result file output should be consolidated from various scripts? If
>someone is using any tool for consolidating the output files please share
>information regarding the same.
>- Is there any tool for converting these files to some reports. I have
heard
>that reports can be generated using some available xslt's in ant. But that
>does not work with large output files. So please suggest alternatives.
I assume you mean combining the results if you run jmeter instances
separately. if you use CSV as your format, just concatenate. Mostly if you
have long running tests , you would load the CSV files into a database
table. You have some listeners that can read the CSV/JTL files , but you'd
have to use a listener whose memory utlization is constant and not
proportional  to number of samples (e.g. summary report -
http://jakarta.apache.org/jmeter/usermanual/component_reference.html section
18.3).

regards
deepak


On Thu, Nov 5, 2009 at 2:54 PM, Harry_ <harjitworks@gmail.com> wrote:

>
> Hi,
>
> We need to do performance testing for our website simulating 5000 users
> using jmeter and other open source tools. The following information is with
> us:
>
> - A csv file containing links and number of times that link last month. The
> file is sorted according to popularity of page visited.
> - With this file I can get information about average number of hits per
> unit
> time say per minute. (estimate can be made regarding max load, min load). I
> will create Scripts which will hit the site pages proportional to there
> usage.
> - All the requests will be http requests.
> - Average size of the page will be 350 KB (including embedded objects
> within
> the page).
>
> Now we need answer to the following questions:
>
> - How should performance testing of the site simulating that much user load
> using Jmeter should be done?
> - What should be the configuration of the machine which will simulate these
> many users? (Someone suggested me 8 core@3 GHz, 16 GB machine).
> - If more then one test machine is required please specify there
> configuration?
> - How many instances of jMeter we need to run for simulating 5000 users?
> - How the result file output should be consolidated from various scripts?
> If
> someone is using any tool for consolidating the output files please share
> information regarding the same.
> - Is there any tool for converting these files to some reports. I have
> heard
> that reports can be generated using some available xslt's in ant. But that
> does not work with large output files. So please suggest alternatives.
> - What other things should i keep in mind for doing the performance test?
>
> We would appreciate if someone can answer these queries based on there
> experience. .
>
> Thanks,
> Harry
> --
> View this message in context:
> http://old.nabble.com/Performance-Test-Setup-for-a-web-site...-tp26223743p26223743.html
> Sent from the JMeter - User mailing list archive at Nabble.com.
>
>
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