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Generational Garbage Collection with IBM JVM for Oracle Unified Directory

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A main difference between IBM J9 JVM and Oracle JVM is that IBM’s JVM has different heap structure than Oracle’s JVM. By default IBM JVM (java 6) does not use Generational Garbage Collector. Such setting has adverse effects on OUD as OUD allocates a huge numbers of transient objects. Using the default IBM JVM settings lead to full garbage collections that freezes the directory services.

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