Performance Optimization and Tuning Techniques for IBM Power Systems Processors Including IBM POWER8

Java

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

•8.1, “Java levels” on page 174

•8.2, “32-bit versus 64-bit Java” on page 174

•8.3, “Memory and page size considerations” on page 175

•8.4, “Capitalizing on POWER8 features with IBM Java” on page 181

•8.5, “Java garbage collection tuning” on page 183

•8.6, “Application scaling” on page 186

•8.8, “Related publications” on page 192

8.1 Java levels

For POWER8 processor-based systems, ...