Book Image

JBoss AS 5 Performance Tuning

By : Francesco Marchioni, Jason Savod
Book Image

JBoss AS 5 Performance Tuning

By: Francesco Marchioni, Jason Savod

Overview of this book

Today's organizations need to deliver faster services to a large set of people and businesses. In order to survive this challenge, enterprises need to optimize the performance of their application server along with its components and hardware. Writing faster applications is no longer just an option for your products; it's an imperative requirement, which you cannot ignore. JBoss AS 5 Performance Tuning will teach you how to deliver fast applications on the JBoss Application Server and Apache Tomcat, giving you a decisive competitive advantage over your competitors. You will learn how to optimize the hardware resources, meeting your application requirements with less expenditure.The performance of Java Enterprise applications is the sum of a set of components including the Java Virtual Machine configuration, the application server configuration (in our case, JBoss AS), the application code itself and ultimately the operating system. This book will show you how to apply the correct tuning methodology and use the tuning tools that will help you to monitor and address any performance issues. By looking more closely at the Java Virtual Machine, you will get a deeper understanding of what the available options are for your applications and how their performance will be affected. You will learn about thread pool tuning, EJB tuning, JMS tuning, Enterprise Java Beans, and the Java Messaging Service. The persistence layer and JBoss Clustering service each have a chapter dedicated to them as they are two of the most crucial elements to configure correctly in order to run a fast application. You will also learn how to tune your web server, enabling you to configure and develop web applications that get the most out of the embedded Tomcat web server.
Table of Contents (17 chapters)
JBoss AS 5 Performance Tuning
About the Author
About the Reviewers
A Tuned Mind

Chapter 3. Tuning the Java Virtual Machine

2nd Circle of Hell: Lust. Here lies programmers overcome by lust, that created objects over 500 KB in size.

In this chapter, we will begin our performance tour with the Java Virtual Machine (JVM) tuning. As you know, every Java application requires a JVM environment to be executed and the JBoss application server is no exception.

With every new release of Java, many improvements have been made at all levels of the runtime system including in the garbage collector, in the code, in the VM handling of objects and threads, and in the compiler optimizations.

We have now got a much faster Virtual Machine but at the price of enhanced complexity due to the increase of the available algorithms and options. Therefore, our primary goal will be to simplify the management of the Virtual Machine and concentrate our efforts on the fixes that will surely pay good dividends such as Java heap and garbage collector settings.

Summing up, this chapter is organized into...