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)

Running Your Test from the Command Line

Once everything has been validated, it is time to start our load test. Best practices recommend using the JMeter command line.

The benefit that the command line has over the GUI is that it consumes fewer resources and gives more reliable results:

  • The GUI management thread no longer disrupts injection.
  • Many memory-intensive components in GUI mode are not active in CLI mode (such as View Results Tree).
  • The listeners will no longer interrupt or interfere with the injection to refresh themselves (no more interruptions from graph updates and counters, for instance).

Here is the command line to execute JMeter:

     <JMETER_HOME>/bin/jmeter -n -t <Path + JMeter scripts file> -l <Results file path>/results.csv

  • n: CLI mode (also called non-GUI mode in JMeter)
  • l: Result file
  • t: JMeter scripts file

Another interesting option is -J{name of the variable}={value of the variable}, which allows...