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

Preface


One day like many, on a JBoss AS Forum:

"Hi

I am running the Acme project using JBoss 5.1.0. My requirement is to allow 1000 concurrent users to access the application. But when I try to access the application with 250 users, the server slows down and finally throws an exception "Could not establish a connection with the database. Does anyone have an idea please help me to solve my problem."

In the beginning, performance was not a concern for software. Early programming languages like C or Cobol were doing a decent job of developing applications and the end user was just discovering the wonders of information technology that would allow him to save a lot of time.

Today we are all aware of the rapidly changing business environment in which we work and live and the impact it has on business and information technology. We recognize that an organization needs to deliver faster services to a larger set of people and companies, and that downtime or poor responses of those services will have a significant impact on the business.

To survive and thrive in such an environment, organizations must consider it an imperative task for their businesses to deliver applications faster than their competitors or they will risk losing potential revenue and reputation among customers.

So tuning an application in today's market is firstly a necessity for survival, but, there are even more subtle reasons, like using your system resources more efficiently. For example, if you manage to meet your system requirements with fewer fixed costs (let's say by using eight CPU machine instead of a 16 one) you are actually using your resources more efficiently and thus saving money. As an additional benefit you can also reduce some variable costs like the price of software licenses, which are usually calculated on the amount of CPUs used.

On the basis of these premises, it's time to reconsider the role of performance tuning in your software development cycle, and that's what this book aims to do.