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From sebb <seb...@gmail.com>
Subject Re: JMS with large files
Date Mon, 09 May 2011 10:39:53 GMT
2011/5/9 Soysal, Aykut <aykut.soysal@logica.com>:
> Hi,
> I change my setup as you suggested, so I have now 1 user with 100 requests,

OK, so fewer concurrent threads means lower maximum memory size.

> reading randomly from a number of files in a folder without any memory problems.
> And I am using Constant Throughput Timer to adjust the message per minute.
>
> Thank you,

Thanks for letting us know how the problem has been sorted.

> Aykut Soysal
>
> -----Original Message-----
> From: sebb [mailto:sebbaz@gmail.com]
> Sent: Friday, May 06, 2011 1:38 AM
> To: JMeter Users List
> Subject: Re: JMS with large files
>
> On 4 May 2011 15:41, Soysal, Aykut <aykut.soysal@logica.com> wrote:
>> Hi,
>>
>> I am trying to load test my ActiveMQ 5.5.0 with JMeter 2.4 with large
>> files (not that large but I tried with 8 and 24 MB)
>
> Are these sizes representative of the actual load you are trying to test?
>
> The JMS API only seems to allow TextMessage types to be populated from
> a String, so the entire file will have to be read into memory.
>
>> I setup two Thread Groups (one with a single publisher, the other with a
>> single subscriber)
>>
>> In my test case I need to test 6 messages per minute, so I set number of
>> threads (users) to 60 and Ramp-up to 600 since I want to run the test
>> longer than a minute.
>>
>> (maybe my setup is not right for what I am trying to accomplish)
>
> You need a Constant Throughput Timer to set the appropriate rate.
>
> The ramp-up does not control test duration directly, that mainly
> depends on the number of samples sent (loops) and the sample rate.
>
> I suggest you try experimenting with a dummy test using Java Samplers
> to see how the Timers work.
>
>> So after a while I get the out of memory error. It seems that the text
>> file is loaded every time and they all piled up in the memory.
>
> See above.
>
>> I tried to turn off listeners but still I get the same error.
>
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