Book Image

Oracle JRockit: The Definitive Guide

Book Image

Oracle JRockit: The Definitive Guide

Overview of this book

Oracle JRockit is one of the industry’s highest performing Java Virtual Machines. Java developers are always on the lookout for better ways to analyze application behavior and gain performance. As we all know, this is not as easy as it looks. Welcome to JRockit: The Definitive Guide.This book helps you gain in-depth knowledge of Java from the JVM’s point of view. We will explain how to write code that works well with the JVM to gain performance and scalability. Starting with the inner workings of the JRockit JVM and finishing with a thorough walkthrough of the tools in the JRockit Mission Control suite, this book is for anyone who wants to know more about how the JVM executes your Java application and how to profile for better performance.
Table of Contents (23 chapters)
Oracle JRockit
Credits
Foreword
About the Authors
Acknowledgement
About the Reviewers
Preface
12
Using the JRockit Management APIs
Bibliography
Glossary
AST
CAS
HIR
IR
JFR
JMX
JRA
JSR
LIR
MD5
MIR
PDE
RCP
SWT
TLA
Index

Chapter 3. Adaptive Memory Management

This chapter is an introduction to automatic and adaptive memory management in the Java runtime. It provides a background on techniques for garbage collection and looks at the history of automatic memory management. It also discusses the advantages and disadvantages of automatic memory management compared to static solutions.

You will learn the following from this chapter:

  • The concepts of automatic and adaptive memory management and understanding the problems and possibilities associated with these

  • How a garbage collector works, including algorithms for garbage collection and implementation details

  • How a garbage collector must be implemented in order to perform well and be scalable

  • About the latency versus throughput equation

  • The problems of object allocation in a runtime and algorithms for doing efficient object allocation

  • The most important Java APIs for memory management, for example, the java.lang.ref package

  • How the JRockit Real Time product and deterministic...