Performance Optimization and Tuning Techniques for IBM Processors, including IBM POWER8

Java

This chapter describes the optimization and tuning of Java based applications that are running on a POWER8 processor-based server. It covers the following topics:

•8.1, “Java levels” on page 162

•8.2, “32-bit versus 64-bit Java” on page 162

•8.3, “Memory and page size considerations” on page 163

•8.4, “Java garbage collection tuning” on page 168

•8.5, “Application scaling” on page 170

•8.6, “Related publications” on page 175

8.1 Java levels

For POWER8, the preferred Java level is Java 7.1 or later. Java 7.1 is the only release of Java that ...