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)

How Many Virtual Users Do I Need?

Once the number of users/transactions has been validated in the previous step, we only have to transform this number into virtual users (Threads) in JMeter.


Do not forget to take into account the requests made by bots (Qwantify (Qwant Bot), Google Bot, Bing Bot, and so on) in the calculation of the number of users.

The maximum number of virtual users configurable per injector depends on:

  • The test plan (simple or complex, well or badly written)
  • The number of listeners and their nature (some require more resources, so if we set too many virtual users, we run the risk of having a performance problem at the level of the injector, thereby distorting the results)
  • The JMeter execution type (GUI or CLI mode (also called Non-GUI mode in JMeter))
  • The resources made available for the test (number of servers, processor, memory, network, and so on)

The maximum number of virtual users is therefore limited by the available resources (injector&apos...