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

Tuning session replication

As we have learnt, the user session needs replication in order to achieve a consistent state of your applications across the cluster. Replication can be a costly affair, especially if the amount of data held in session is significant. There are however some available strategies, which can mitigate a lot the cost of data replication and thus improve the performance of your cluster:

  • Override isModified method: By including an isModified method in your SFSBs, you can achieve fine-grained control over data replication. Applicable to SFSBs only.

  • Use buddy replication. By using buddy replication you are not replicating the session data to all nodes but to a limited set of nodes. Can be applicable both to SFSBs and HttpSession.

  • Configure replication granularity and replication trigger. You can apply custom session policies to your HttpSession to define when data needs to be replicated and which elements need to be replicated as well. Applicable to HttpSession.

Override SFSB...