POWER7 and POWER7+ Optimization and Tuning Guide

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Java

This chapter describes the optimization and tuning of Java based applications that are running on a POWER7 processor-based server. It covers the following topics:

•Java levels

•32-bit versus 64-bit Java

•Memory and page size considerations

•Java garbage collection tuning

•Application scaling

7.1 Java levels

You should use Java 6 SR7 or later for POWER7 Systems for two primary reasons. First, 64 KB pages are used for JVM text, data, and stack ...

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