Book Image

Java EE 8 High Performance

By : Romain Manni-Bucau
Book Image

Java EE 8 High Performance

By: Romain Manni-Bucau

Overview of this book

The ease with which we write applications has been increasing, but with this comes the need to address their performance. A balancing act between easily implementing complex applications and keeping their performance optimal is a present-day need. In this book, we explore how to achieve this crucial balance while developing and deploying applications with Java EE 8. The book starts by analyzing various Java EE specifications to identify those potentially affecting performance adversely. Then, we move on to monitoring techniques that enable us to identify performance bottlenecks and optimize performance metrics. Next, we look at techniques that help us achieve high performance: memory optimization, concurrency, multi-threading, scaling, and caching. We also look at fault tolerance solutions and the importance of logging. Lastly, you will learn to benchmark your application and also implement solutions for continuous performance evaluation. By the end of the book, you will have gained insights into various techniques and solutions that will help create high-performance applications in the Java EE 8 environment.
Table of Contents (12 chapters)

Java tools to know what my application is doing

Two critical factors are directly linked to performance when you take an application as a black box:

  • Memory usage: If too much memory is consumed, it can slow down the application or even make it dysfunctional
  • CPU time: If an operation is too slow, it will consume a lot of CPU cycles and impact the overall performance

Without too much external tooling (except the Java Development Kit (JDK) and/or operating system tools), you can easily extract a lot of information and start working on the performance.

The jcmd command – the small command line utility that does a lot

Since Java 8, the JDK has been coming with the jcmd command, which allows you to execute commands on a...