Load testing is the process of putting demand on a system or application and measuring its response. The goal is to determine how the system or application behaves under various load conditions.
Load testing is important because it can help identify potential performance bottlenecks in the system or application. It can also help determine the maximum amount of users that the system or application can handle.
There are many different tools that can be used for load testing. In this post, we will focus on Apache JMeter, which is a popular open source tool.
Apache JMeter can be downloaded from the following link:
Once you have downloaded the file, unzip it and you should see the following directory structure:
apache-jmeter-3.1
├── bin
├── docs
├── lib
└── printable_docs
A test plan is a set of instructions that JMeter will use to run a test. The test plan should include the following elements:
To create a test plan, launch JMeter and you should see the following screen:
To add a Thread Group, right-click on the Test Plan and select Add > Threads(Users) > Thread Group.
To add a Sampler, right-click on the Thread Group and select Add > Sampler > HTTP Request.
To add a Listener, right-click on the Thread Group and select Add > Listener > View Results Tree.
Once you have added the Thread Group, Sampler, and Listener to the Test Plan, you need to configure them.
To configure the Thread Group, select it and you should see the following options:
To configure the Sampler, select it and you should see the following options:
To configure the Listener, select it and you should see the following options:
Once you have configured the Test Plan, you are ready to run the test. To run the test, select the Test Plan and click on the Run button.
JMeter will now run the test and you should see the results in the Listener.
The results of the test can be analyzed to determine the performance of the system or application.
The following metrics can be used to analyze the results: