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Topic  
Postnext
Adam RussSubject: How to increase JVM Heap Size?
Author: Adam Russ
Date: 28 Jul 2011 09:26 AM
Originally Posted: 28 Jul 2011 09:25 AM
Hello,

Trying to run an XSL on a big XML (8GB) gives me a java heap error.
I tried increasing the heap size using " -Xms512m -Xmx32768m " both in JVM parameters and External JVM parameter and I got an error "Cant connect to JVM". Eclipse has no problems using "-Xms512m -Xmx32768m" so the problem is with Stylus.

How can I increase the heap size?

Thanks
Postnext
Ivan PedruzziSubject: How to increase JVM Heap Size?
Author: Ivan Pedruzzi
Date: 28 Jul 2011 05:54 PM
Hi Adam,

Which Stylus Studio version are you running?
Which Java Virtual Machine?

if the JVM fails to initialize you should see a message like the one attached

Could you share a screenshot when the error comes up?

Thanks for your help
Ivan
Postnext
Adam RussSubject: How to increase JVM Heap Size?
Author: Adam Russ
Date: 28 Jul 2011 06:34 PM
Hi Ivan,

Stylus Home 2011
1756a
Java 1.6
Postnext
Ivan PedruzziSubject: How to increase JVM Heap Size?
Author: Ivan Pedruzzi
Date: 28 Jul 2011 10:03 PM

It looks like the JVM did not load at all.

I fear something is wrong in the parameter values

Could you share a screenshot of JVM settings -> JRE parameters?

Thanks
Ivan
Postnext
Adam RussSubject: How to increase JVM Heap Size?
Author: Adam Russ
Date: 29 Jul 2011 06:40 AM
Hello Ivan,

These are the standard:

-Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000

And these are what I have:

-Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 -Xms512m -Xmx32768m
Postnext
Ivan PedruzziSubject: How to increase JVM Heap Size?
Author: Ivan Pedruzzi
Date: 30 Jul 2011 01:07 AM

Does the JVM start with just the initial value -Xms512m?
Postnext
Adam RussSubject: How to increase JVM Heap Size?
Author: Adam Russ
Date: 31 Jul 2011 04:28 AM
Yes.

Is this because stylus is 32bit? cause the eclipse is 32bit too and works fine.
Postnext
Kurt WaldSubject: How to increase JVM Heap Size?
Author: Kurt Wald
Date: 27 Oct 2011 02:12 PM
For a 32bit JVM max heap size is around 1.5 GB. The actual max varies and may be tested increasing -Xmx fom 1500m manually until this error appears. No 32bit process can claim more than 2GB (in this case at least including the JVM itself) under Windows.
Postnext
Adam RussSubject: How to increase JVM Heap Size?
Author: Adam Russ
Date: 11 Dec 2011 08:04 AM
OK thank you.

1. So how do you suggest I handle big XML files?
2. Is there a 64-bit stylus version?
3. What is your suggestion if I require 4-8GB Heap?

Thank you.
Posttop
Ivan PedruzziSubject: How to increase JVM Heap Size?
Author: Ivan Pedruzzi
Date: 12 Dec 2011 02:36 PM

Stylus Studio is only available as x86 32 bit.

You could try to generate the Java code and run the transformation from the command line using a 64 bit JVM.

A better solution would be to re-design the XSLT to make it run in streaming fashion, if possible.

If you share the transformation with us (at stylussupport@ivitechnologies.com) we will take a look and offer suggestions.

Hope this helps
Ivan Pedruzzi
Stylus Studio Team
   
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