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Posted to user@jmeter.apache.org by Noel O'Brien <no...@newbay.com> on 2009/09/04 12:24:55 UTC

Re: Heap size in jmeter.bat file

Hi, 

-Xms<size> set initial Java heap size 
-Xmx<size> set maximum Java heap size 

If your machine only has 512 memory and you're setting the minimum JVM memory to 512, then either JMeter will not start or you'll get an OutOfMemory Error. OS and native processes already consume memory, so the request for a minimum of 512 (when there isn't 512 available) will not likely be granted 

Regards, 
Noel 

----- "vijayakumar" <bc...@altechindia.com> wrote: 
> Dear All , 
> 
> Can anyone please clearly explain what it means ? 
> 
> If I define the Heap Size in JMeter batch file as ' set HEAP=-Xms512m -Xmx512m ' what will happen 
> If it is set as ' set HEAP=-Xms512m -Xmx1024m ' , what will happen ? 
> 
> My RAM Size is 512 MB . then can Iset the memory as 512 - 1024 ? 
> 
> Thank you in advance 
> 
> With warm regards, 
> Vijayakumar.C

Re: Heap size in jmeter.bat file

Posted by vijayakumar <bc...@altechindia.com>.

Thanks Noel ,

So Can I set the min size as 128 and max size as 512 as my machine memory 
size is 512 . Is this okay ?

Thanking You
With warm regards,
Vijayakumar.C
----- Original Message ----- 
From: "Noel O'Brien" <no...@newbay.com>
To: "JMeter Users List" <jm...@jakarta.apache.org>
Sent: Friday, September 04, 2009 3:54 PM
Subject: Re: Heap size in jmeter.bat file


> Hi,
>
> -Xms<size> set initial Java heap size
> -Xmx<size> set maximum Java heap size
>
> If your machine only has 512 memory and you're setting the minimum JVM 
> memory to 512, then either JMeter will not start or you'll get an 
> OutOfMemory Error. OS and native processes already consume memory, so the 
> request for a minimum of 512 (when there isn't 512 available) will not 
> likely be granted
>
> Regards,
> Noel
>
> ----- "vijayakumar" <bc...@altechindia.com> wrote:
>> Dear All ,
>>
>> Can anyone please clearly explain what it means ?
>>
>> If I define the Heap Size in JMeter batch file as ' set 
>> HEAP=-Xms512m -Xmx512m ' what will happen
>> If it is set as ' set HEAP=-Xms512m -Xmx1024m ' , what will happen ?
>>
>> My RAM Size is 512 MB . then can Iset the memory as 512 - 1024 ?
>>
>> Thank you in advance
>>
>> With warm regards,
>> Vijayakumar.C 


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