How to calculate the number of loops and threads in JMeter?

10 months ago

Noah Thompson

2 minutes

Here is the method for calculating the number of loops and threads in JMeter:

Loop count refers to the number of times each thread will execute all the samplers (e.g. HTTP requests) in a test plan. By default, JMeter’s loop count is set to 1, meaning each thread will only execute once. This value can be changed by setting the loop count in the thread group. For example, setting the loop count to 5 will result in each thread repeating the execution of samplers in the test plan 5 times.
Number of Threads: The number of threads indicates the quantity of threads that will concurrently execute the samplers in the test plan. This value can be modified by adjusting the thread count in the thread group. For example, setting the thread count to 10 will simultaneously start 10 threads to execute the samplers in the test plan.

The calculation of these two parameters depends on your testing goals and testing environment. Here are some common calculation methods:

Number of loops: If you want to simulate multiple users executing the same test plan simultaneously, you can set the number of loops to 1, and then simulate concurrent users by adjusting the thread count accordingly. For example, if you want to simulate 10 concurrent users, each performing 10 loops, you can set the thread count to 10 and the number of loops to 10.
Number of Threads: The calculation of the number of threads usually depends on your testing goals and environment. If you want to simulate high concurrent load, you can set the number of threads based on the target load and system capabilities. For example, if your goal is to simulate 1000 concurrent users and your system can handle this load, you can set the number of threads to 1000.

Please note that the number of iterations and threads set will affect the execution time and load of the test. Therefore, before conducting performance testing, it is recommended to carefully calculate these two parameters based on the testing objectives and environment.