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GlassFish - HeapSize settings

After playing around with some VM settings in my GlassFish 3.1.1 environment (development and productive) I came to a setup which brings up my glassfish server much faster. Here are my settings 

Development (3GB RAM)

-client
-XX:+AggressiveHeap
-Xmx1024m
-Xms1024m
-Xss128k
-XX:+DisableExplicitGC

 

Productiv (4GB Ram)

-server
-XX:+AggressiveHeap
-Xmx2048m
-Xms2048m
-Xss128k
-XX:+DisableExplicitGC

Here is also a useful link for further performance settings:

http://jfarcand.wordpress.com/2009/11/27/putting-glassfish-v3-in-production-essential-surviving-guide/