JVM arguments
Java virtual machine (JVM) arguments are defined in the startup command script (Oracle WebLogic) or Admin Console (IBM® WebSphere®) for your web application server.
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Decide on a maximum heap size for the JVM, based on the memory availability in the server. (Interact is not a memory intensive application). Set the max and min sizes of the heap to be the same (using -Xmx and -Xms arguments), which increases the startup time, but gives better throughput.
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-verbosegc -XX:+PrintGCDetails
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-XX:+UseConcMarkSweepGC -Xmn512m -XX:SurvivorRatio=6
In general, the young collection should be about 1/4 to 1/2 of the total heap. The Survivor Space can be set to 1/8th the size of young collection.
References
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