JMeter Constant Timer

JMeter Constant Timer

A Constant Timer in JMeter ensures that each thread pauses for the same amount of time between requests. This helps in simulating real-world user behavior where requests are not sent continuously without delay.

Add a Constant Timer

To apply a timer to a single sampler, we need to add the timer as a child element of the sampler. This timer will be applied before the sampler is executed.

Create a Thread Group

1. Right-click Test Plan > Add > Threads (Users) > Thread Group.
2. Leave all fields as default.

Add HTTP Request Defaults

1. Right-click Thread Group > Add > Config Element > HTTP Request Defaults.
2. Set Server Name to: example.com.

Add HTTP Requests

1. Right-click Thread Group > Add > Sampler > HTTP Request.
2. Rename it to Home Page.
3. Set Path as: /.

Add More HTTP Requests

• Add another HTTP Request, rename it to About Page, and set Path as /about.

Add Listener to View Results

1. Right-click Thread Group > Add > Listener > View Results in Table.

Save and Run the Test

• Save the test and run it to observe request execution timing.

Add a Constant Timer

• Right-click Thread Group > Add > Timer > Constant Timer.

 

• Set Thread Delay to 300 milliseconds.

 

Save and Run the Test Again

• Run the test again and compare results.

 

Start Time for About Page = Start Time for Home Page + Sample Time + 300ms.

This confirms that a 300 milliseconds delay is applied before each request, ensuring controlled execution.