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From unjc email <unjc.em...@gmail.com>
Subject Re: High CPU and memory consumption when load testing with HTTP Sampler
Date Mon, 30 Jul 2012 13:54:49 GMT
Flavio, my box has 12GB RAM and 16-processors installed with
Centos6.2, JDK 1.6 and Jmeter 2.7.


Thanks.

On Mon, Jul 30, 2012 at 7:39 AM, Flavio Cysne <flaviocysne@gmail.com> wrote:
> Can you provide us with your box configuration? OS distribution and
> version, JDK version, JMeter version, Hardware spec.
>
> Try with other configurations of GC like -Xincgc, -XX:UseParallelOldGC,
> -XX:UseConcMarkSweepGC, etc (one at a time) and compare the results.
> Try with -XX:AggressiveHeap (JDK 1.4) or -XX:+AggressiveOpts (JDK 1.5+)
> instead of -Xms and -Xmx. (
> http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html
> )
>
> I work with a distributed environment with 3 JMeter servers per machine
> (CentOS5, 6GB RAM, 2-cores processor, 20GB HD), using 1.5GB heap per JMeter
> server. This configuration hold almost 300 threads per JMeter server with
> no problems.
> Sometimes a big heap mess up more than help.
>
> Regards.
> Flávio Cysne
>
> 2012/7/27 Deepak Goel <deicool@gmail.com>
>
>> Hey
>>
>> You might need a bigger hardware box, i guess :)
>>
>> :)
>> Deepak
>>
>> On 7/25/12, Philippe Mouawad <philippe.mouawad@gmail.com> wrote:
>> > Hello,
>> > Read this :
>> > http://jmeter.apache.org/usermanual/best-practices.html
>> >
>> > Ensure you are not using View Results Tree or any other costly listeners.
>> >
>> > After checking all these points don't jump to conclusion that other
>> > parameters are OK if your original load test tool is reporting OK.
>> > Built-in samplers are rather highly tested and used , so i am not sure
>> > writing your own will help.
>> >
>> > Regards
>> > Philippe M.
>> >
>> > On Tue, Jul 24, 2012 at 8:28 PM, unjc email <unjc.email@gmail.com>
>> wrote:
>> >
>> >> Hi all,
>> >>
>> >> I have a test plan with 100 threads of HTTP Request samplers hitting a
>> >> web server via proxy server.  My goal is to hammer the server as fast
>> >> as possible for an hour.  When I run the test for first 30 seconds,
>> >> the throughput is excellent; slowly I found it keeps dropping.  I am
>> >> sure it's not a problem with the network, proxy or web server because
>> >> the other load-testing tool has been working fine before I switch to
>> >> try Jmeter.
>> >>
>> >> I found that Jmeter consumes lots of memory and cpu cycles during the
>> >> test.  I have tried "Statistical" and "Stripped" mode, along with
>> >> 2048M heap size.  Nothing really helps to keep the test running for
>> >> long period of time.  The java process is one hungry monster in the
>> >> top stats.  Is there any lighter sampler available (that supports
>> >> proxy, custom originating IP, and https)?  If not, is there any good
>> >> document that could help start writing my own plugin?   Any comment or
>> >> advice will be greatly appreciated.
>> >>
>> >>
>> >>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>> >>  6128 root      20   0 10.5g 2.3g  14m S 539.2 19.5   6:16.95 java
>> >> -server -XX:+HeapDumpOnOutOfMemoryError -Xms2048m -Xmx2048m
>> >> -XX:NewSize=128m -XX:MaxNewSize=128m -XX:MaxTenuringThreshold=2
>> >> -Dsun.rmi.dgc.client.gcInterval=6
>> >>
>> >>
>> >>
>> >> Thanks,
>> >> Jacky
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: user-unsubscribe@jmeter.apache.org
>> >> For additional commands, e-mail: user-help@jmeter.apache.org
>> >>
>> >>
>> >
>> >
>> > --
>> > Cordialement.
>> > Philippe Mouawad.
>> >
>>
>>
>> --
>> Namaskara~Nalama~Guten Tag~Bonjour
>>
>>
>>    --
>> Keigu
>>
>> Deepak
>> +91-9765089593
>> deicool@gmail.com
>> http://www.simtree.net
>>
>> Skype: thumsupdeicool
>> Google talk: deicool
>> Blog: http://loveandfearless.wordpress.com
>> Facebook: http://www.facebook.com/deicool
>>
>> "Contribute to the world, environment and more :
>> http://www.gridrepublic.org
>> "
>>
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>>

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