Thanks Bharath,
We know this parameters, in fact we setting this two parameters and
nothing. We think that we are setting in a mistaken place, because
anything happens. We change values with Sun Java System Application
Server.
We change Application Server > JVM Settings > JVM Options and then we add
two options: -Xms1024m and -Xmx1024m.
After that, we shutdown the application server but ... anything! the heap
memory is 64M.
what do you think?
Susana
> Hi Susana,
>
> Did you try setting -Xms (Min Heap Size) to be equal to -Xmx
> (Max Heap Size)?
>
> Lets say you wanted 1024MB for your application then you can set -Xms
> 1024m -Xmx 1024m. This forces the JVM to commit 1024MB upon startup. If
> you don't set -Xms then JVM commits whatever application requires and
> but allowed to max till -Xmx heap size.
>
> In your current case, your application might be using 64MB upon startup
> and allowed to grow till -Xmx heap size. But you can force JVM to
> allocate/commit the initial memory you want with -Xms. Still, the
> maximum memory required for your application is controlled by -Xmx.
>
> If you want to verify this, you can use jconsole (memory tab) to see
> used memory vs committed memory for your application.
>
> Let us know if you have more questions,
> -Bharath
>
> Glassfish
> http://www.sun.com/software/products/appsrvr/support.jsp
>
>
>
>>Hi Bharath
>>
>> Yes, we work with Glassfish and Netbeans. We tried to increase heap java
>>memory with -Xmx jvm option but we can't increase more than 64MB
>>
>> Working directly with Netbeans heap memory increase to 1024MB, but not
>>without Netbeans.
>>
>> Maybe we must change another jvm option?
>>
>> thanks
>>
>> Susana.
>>
>>
>>
>>>I am assuming you are programming your application on Glassfish?
>>>
>>>Please refer heap sizing section here
>>>http://java.sun.com/performance/reference/whitepapers/tuning.html
>>>
>>>Also you may want to refer,
>>>http://java.sun.com/docs/hotspot/HotSpotFAQ.html#gc_heap_32bit
>>>
>>>You can increase the heap size with -Xmx jvm option.
>>>
>>>-Bharath
>>>
>>>
>>>
>>>>We are programming an application that requires to work with 3 Gb of
>>>>heap
>>>>memory from a java virtual machine but, in spite we had prove with the
>>>>Xmx parameter in order to obtain the said necessary memory level, we
>>>> had
>>>>only obtained 64 Mb (we had used MemoryMXBean and MemoryUsage in order
>>>> to
>>>>know the disposed memory level)
>>>>
>>>>Please, would you tell us how to increase the heap memory level at the
>>>>java virtual machine?
>>>>
>>>>
>>>>
>>>>
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>>>>
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>>>
>>
>>
>>
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>
>