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
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
A Tuned Mind
Index

Appendix A. A Tuned Mind

At the end of this long journey, we have covered many aspects of performance tuning. One of the hardest tasks when writing this book was describing a complex process like tuning in the most practical way, without sacrificing too much theory. As a matter of fact, most people like to think that performance tuning is nothing but a silver bullet which can be shot at any time. Frustrated by tight deadlines and intense pressure to reach their goals, they misunderstand the precise role of performance in the software lifecycle.

Some quick tips do exist and this book has not been parsimonious at showing a great deal of them; but they are there just to enhance the performance of a well-written and designed application or to mitigate the effect of bottlenecks we do not have any control on it.

The real secret behind a lighting fast application is a good tuning methodology, which starts right when application requirements are defined and continues until its last mile, when the application is rolled in production. We are certainly aware that this is a questionable statement as many architects deliberately exclude the tuning methodology from any design strategy. We do not claim that our choices are better than other's. What we do believe is that, without a special virtue called flexibility, architects will have a hard time to survive these turbulent years.

A flexible architect re-uses his/her wealth of experience, including both successes and failures. At the same time, the flexible architect is open to new suggestions and can fearlessly and strategically adapts his/her mind.

As time passes, inevitably some of the tips presented in this book will go stale and new great instruments will appear on the market. In the end, what (we dare to say) will stay the same is that good performance is not accidental; it takes planning, expertise, and plenty of testing. It needs that, when you define your performance requirements, you won't be satisfied with a generic "fast" word from your customers but pretend an exact measure of your performance goals and build a plan to support them. Without all these things, tuning is almost a bet. And you know that if you are a frequent better, you are also a frequent loser.