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

Reasons for benchmarking


Benchmarking is always needed in a complex environment. There are several reasons for benchmarking, for example making sure that an application is actually usable in the real world or to detect and avoid performance regressions when new code is checked in. Benchmarking can also help optimize a complex application by breaking it down into more manageable problem domains (specialized benchmarks) that are easier to optimize. Finally, benchmarking should not be underestimated as a tool for marketing purposes.

Performance goals

Benchmarking is relevant in software development on all levels, from OEM or Java Virtual Machine vendors to developers of standalone Java applications. It is too often the case in software development that while the functionality goals of an application are well specified, no performance goals are defined at all. Without performance goals and benchmarks in place to track the progress of those goals, the end result may be stable but completely unusable...