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From Deepak Shetty <shet...@gmail.com>
Subject Re: OutofMemory-Heap Space
Date Thu, 22 Oct 2009 06:04:16 GMT
hi
the java garbage collector does that for you. The problem is you can only
free memory that isnt being used. If you have for e.g. the View results Tree
Listener then every response is in use and is in memory and cant be removed
. And its proportional to the number of requests 100 requests will always
occupy more memory than 10. Contrast this with an aggregate summary report
which isnt as bad..
regards
deepak

On Wed, Oct 21, 2009 at 10:58 PM, Radhika_Singireddy <
Radhika_Singireddy@mahindrasatyam.net> wrote:

> Ok..I have monitored the server memory usage.
> I will try to reduce the listeners(View Results tree) and check for the
> response..also how can I release or free up the memory occupied by jmeter?
>
>
> Regards
> Radhika Singireddy
>
>
> -----Original Message-----
> From: Deepak Shetty [mailto:shettyd@gmail.com]
> Sent: Thursday, October 22, 2009 11:22 AM
> To: JMeter Users List
> Subject: Re: OutofMemory-Heap Space
>
> No this error is due to jmeter not having memory (its possible jmeter code
> may have a leak but it is more likely that your listeners cause this issue)
> >Because by monitoring different metrics I found that the memory usage
> graph
> value is maintained as constant and after a small >duration jmeter is
> stopping the execution.
> What did you monitor? You would need to check JMX console for this process.
> If you measure OS memory you will see it as constant.
> When you startup JMeter (or any Java process), it will allocate Xms memory
> and can grow upto Xmx (ignoring other things like perm gen etc). Typically
> Xms = Xmx and the Operating System will show you that constant memory is
> being used (say 512MB for java). The heap out of memory means that all
> 512Mb
> has been used up but the java app still needs more memory (but it cant grow
> beyond Xmx , hence the exception)
> regards
> deepak
>
> On Wed, Oct 21, 2009 at 10:46 PM, Radhika_Singireddy <
> Radhika_Singireddy@mahindrasatyam.net> wrote:
>
> > Ok thanks for your reply...
> > Can you tell me whether there is a chance that the objects are not
> properly
> > garbage collected or the code(application) is occupying memory and not
> > releasing the memory?
> > Or is it only jmeter that's occupying more memory and causing this error?
> >
> > Because by monitoring different metrics I found that the memory usage
> graph
> > value is maintained as constant and after a small duration jmeter is
> > stopping the execution.
> >
> > Regards
> > Radhika Singireddy
> >
> >
> > -----Original Message-----
> > From: Deepak Shetty [mailto:shettyd@gmail.com]
> > Sent: Wednesday, October 21, 2009 9:33 PM
> > To: JMeter Users List
> > Subject: Re: OutofMemory-Heap Space
> >
> > >Jmeter log is displaying:    Test failed! java.lang.OutOfMemoryError:
> Java
> > heap space error. But the server log is not showing any error.
> > Thats because your jmeter client (which is also a java app) ran out of
> > memory, not your server
> > >What may be the possible cause? Is it because of memory leak or that
> > Jmeter
> > is not able to handle it?
> > Its probably caused by a Listener(View results tree is the most
> problematic
> > one since it must store the entire response in memory). When running an
> > actual load test , follow as many of
> >
> http://jakarta.apache.org/jmeter/usermanual/best-practices.html#lean_meanas
> > you can.
> > Increasing Heap memory on jmeter will delay the out of memory
> > regards
> > deepak
> >
> > On Wed, Oct 21, 2009 at 4:06 AM, Radhika_Singireddy <
> > Radhika_Singireddy@mahindrasatyam.net> wrote:
> >
> > > I have a quick question for the previous reply given to me.
> > > I have run a scenario with 50 concurrent users for one iteration or
> loop.
> > > I have run the same scenario with 50 concurrent users for 10
> iterations,
> > > and the execution stopped after two iterations.
> > >
> > > Jmeter log is displaying:    Test failed! java.lang.OutOfMemoryError:
> > Java
> > > heap space error. But the server log is not showing any error.
> > >
> > > What may be the possible cause? Is it because of memory leak or that
> > Jmeter
> > > is not able to handle it?
> > > I got this doubt as the application server log is not showing any
> errors
> > > while only Jmeter log is displaying this error.
> > > Please explain on how can we confirm whether there is a memory leak or
> > not
> > > in an application?
> > >
> > > Regards
> > > Radhika Singireddy
> > >
> > >
> > > -----Original Message-----
> > > From: Deepak Goel [mailto:deicool@gmail.com]
> > > Sent: Wednesday, September 23, 2009 4:15 PM
> > > To: JMeter Users List
> > > Subject: Re: OutofMemory-Heap Space
> > >
> > > There might be a memory leak happening in your application. Mebbe you
> > > should try to profile it...
> > >
> > > On Wed, Sep 23, 2009 at 4:04 PM, Radhika_Singireddy
> > > <Radhika_Singireddy@mahindrasatyam.net> wrote:
> > > > Hi All,
> > > >
> > > >
> > > >
> > > > When I tried to execute a scenario with 10 concurrent users,
> following
> > > error has occurred. I have changed the settings and increased the heap
> > size
> > > from 512m to 1024m and the execution was successful.
> > > >
> > > >
> > > >
> > > > 15:35:49 ERROR - jmeter.threads.JMeterThread: Test failed!
> > > java.lang.OutOfMemoryError: Java heap space
> > > >
> > > >
> > > >
> > > > Now, I have increased the duration of execution from 30 minutes to 60
> > > minutes and tried executing the same scenario. Threads are stopped
> > showing a
> > > message as below.
> > > >
> > > >
> > > >
> > > > Java.lang.OutofMemoryError: Java heap space
> > > >
> > > > Dumping heap to java_pid236.hprof ...
> > > >
> > > > Heap dump file created[xxxxxxxxxx bytes in xx.xxx secs]
> > > >
> > > >
> > > >
> > > >  Why are threads getting stopped?   Can anyone give a solution...
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Regards
> > > >
> > > > Radhika Singireddy
> > > >
> > > >
> > > >
> > > > ________________________________
> > > > DISCLAIMER:
> > > > This email (including any attachments) is intended for the sole use
> of
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> > AND
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> > > >
> > >
> > >
> > >
> > > --
> > > Regards
> > >
> > > Deepak Goel
> > > +91- 9765089593
> > > deicool@gmail.com
> > >
> > > "Clean and Green Environment"
> > >
> > > ---------------------------------------------------------------------
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> This email (including any attachments) is intended for the sole use of the
> intended recipient/s and may contain material that is CONFIDENTIAL AND
> PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or
> distribution or forwarding of any or all of the contents in this message is
> STRICTLY PROHIBITED. If you are not the intended recipient, please contact
> the sender by email and delete all copies; your cooperation in this regard
> is appreciated.
>
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