Book Image

Master Apache JMeter - From Load Testing to DevOps

By : Antonio Gomes Rodrigues, Bruno Demion (Milamber), Philippe Mouawad
Book Image

Master Apache JMeter - From Load Testing to DevOps

By: Antonio Gomes Rodrigues, Bruno Demion (Milamber), Philippe Mouawad

Overview of this book

Load tests help identify the maximum number of requests a software system can handle. One popular open source tool for load testing is JMeter. By leveraging the features and capabilities of JMeter, you can perform extensive load testing and fix issues in your application before they become problematic. This book is written by JMeter developers and begins by discussing the whole process, including recording a script, setting it up, and launching it, enabling you to almost immediately start load testing. You'll learn the best practices that you must follow while designing test cases. You'll also explore the different protocols offered by JMeter through various real-world examples. Finally, you'll see how to integrate JMeter into the DevOps approach and create professional reports. You'll discover ways to use the eco-system of JMeter to integrate new protocols, enrich its monitoring, and leverage its power through the use of the cloud. By the end of this book, you'll know all that's needed to perform comprehensive load testing on your applications by using all the best practices and features of JMeter.
Table of Contents (14 chapters)

A Bit of Theory

The architecture of a basic engine has become very complex, as shown in the following diagram (note that this is only a simplified overview of the Oracle architecture).

The complexity is such that user expertise in one version of Oracle is partly outdated as soon as the next version is released:

Figure 9.2: A simplified description of Oracle architecture

Each part of this architecture can be tuned based on the expected usage of the database.

Add to this the fact that misconfigured databases or unoptimized SQL queries are the cause of most common performance problems, and you can understand the importance of performing load tests on the database server.

For those who are not yet convinced of the importance of tuning the database engine architecture, the following graph shows an example of the response time of a SQL query on Oracle without tuning (where SGA, one of the Oracle database caches, is not correctly configured) versus an optimized Oracle (where the size...