Re: [Ikvm-developers] How can I pass -Xms2g -Xmx2g parameters to the IKVM.NET JVM? v:ikvm-7.0.4335.0

[Volker B. <vol...@go...>]

Hi,

There is no separate Java VM inside from .NET. The class 
java.util.concurrent.ConcurrentHashMap is now a .NET class. Because the 
.NET framefork has not such parameter that IKVM will never have such 
parameter.

How many memory consume your process if the error occur?

Can you make a reproducible sample for us?

Volker


Am 09.02.2012 20:22, schrieb Pasham, Rampradeep:
>
> Hi Volker, Thanks for your response.
>
> I understand .NET has no memory limits. As I mentioned, when a Java 
> program is compiled using ikvmc and is running on the IKVM.NET JVM, I 
> am getting java.lang.OutOfMemoryError while trying to expand the 
> java.util.concurrent.ConcurrentHashMap. which makes me think that the 
> JVM is using the memory in the same way as a HotSpot JVM would. At the 
> time of trying to expand java.util.concurrent.ConcurrentHashMap, the 
> JVM is not able to find enough consecutive memory buffer that is 
> causing it to throw the OutOfMemoryError. The system this application 
> is running is 64bit and has a lot of memory at it's disposal, but 
> still I get this OOM. I was wondering if we can pass --Xsm2g argument 
> to the IKVM.NET JVM somehow as a command line so as to pre-allocate 2g 
> memory for this JVM to play around at runtime. I understand that we 
> might still run in OOM even in this case, but at least we can assign 
> more memory for the next run.
>
> You can look at the way --Xsm and --Xsx work with the Hotspot jvm.
>
> Thanks!
>
> *From:*Volker Berlin [mailto:VB...@in...]
> *Sent:* Thursday, February 09, 2012 2:36 AM
> *To:* ikv...@li...
> *Subject:* Re: [Ikvm-developers] How can I pass -Xms2g -Xmx2g 
> parameters to the IKVM.NET JVM? v:ikvm-7.0.4335.0
>
> Hi,
>
> I think .NET has no memory limit. That there are no such command line 
> switch. How many memory consume your process?
>
> Volker
>
> *Von:*Pasham, Rampradeep [mailto:Ram...@sa...] 
> <mailto:[mailto:Ram...@sa...]>
> *Gesendet:* Mittwoch, 8. Februar 2012 21:45
> *An:* ikv...@li... 
> <mailto:ikv...@li...>
> *Betreff:* [Ikvm-developers] How can I pass -Xms2g -Xmx2g parameters 
> to the IKVM.NET JVM? v:ikvm-7.0.4335.0
>
> Hi Guys, First of all I have to congratulate you for this wonderful 
> product. And Thanks!
>
> I am trying to invoke market data api in Java from my .Net 
> application. For this I complied all the dependent jars to dlls and 
> used in my .Net application. Everything worked fine until I started 
> using api calls that would require more memory for the java objects. I 
> started getting the java.lang.OutOfMemoryError while trying to expand 
> the java.util.concurrent.ConcurrentHashMap. Running the same requests 
> directly in java doesn't cause this OutOfMemoryError.
>
> How does the IKCM.NET JVM handle memory re-allocations? Is there a way 
> we can pre-assign memory for this JVM by using --Xms2g --Xmx2g type of 
> arguments like we pass to Java standard JVM at startup?
>
> Thanks in advance!
>
> Ram
>
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