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What arguments can we add to 'Generic JVM Argument' to display the GC info in RAD Websphere v7.5?

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In RAD WebSphere, I want to add the some arguments to the JVM, in order to display some information about the garbage collection. I notice that this action is in the Administration Console-->Server-->Application Server-->Server1-->Java and Process Management-->Process Definition-->Java Virtual Machine-->Generic JVM Argument.

Normally in Oracle JDK, there are arguments that we can add like: -Xms1000m -Xmx1000m -XX:PermSize=256m -XX:MaxPermSize=256m -XX:MaxNewSize=500m -XX:NewSize=500m -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xloggc:/home/sherpa/Sherpa/Server/log/gc.log -XX:+HeapDumpOnOutOfMemoryError.

I tried to add these arguments in it, but it seems that it doesn't work with these arguments.

So is there some specific arguments that can only be used in RAD WebSphere? What arguments can we use in RAD?

I am looking forward to your opinions!

It is sorta covered in the JavaRanch Style Guide.
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