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Oracle SOA Suite Performance Tuning Cookbook by Matt Brasier, Nicholas Wright

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Setting the size of the Permanent Generation heap

Permanent Generation (PermGen) is a special part of the Java heap that contains the class templates for all of the Java classes on your classpath. The size of the Permanent Generation heap can be controlled via the -XX:PermSize and -XX:MaxPermSize flags. Note that this is not a feature of the JRockit JVM (which stores its classes in the heap)—as such this recipe does not apply if you have chosen that JVM.

Getting ready

You will need to have Oracle SOA Suite 11g installed for this recipe. This command is the same whether you're using the Hotspot or JRockit JVM.

How to do it…

Perform the following steps to configure the size of the Permanent Generation heap:

  1. Navigate to the domain's home directory:

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