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I am executing the test plan in which I have created 5 Thread Groups for execution. I want to execute these thread groups parallelly but want to add some delay time in each thread group suppose 10 seconds of delay I want.

  • The first thread group will be executed and after 10 seconds
  • The second Thread group will be executed parallelly and after again 10 seconds
  • And the third thread group will be executed parallelly till to reach the last one like this.

Below is the Image for more information that how I have created my test plan. Please refer to the same. (Currently, I have used only 2 thread groups to meet the expected outcomes)

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Have you considered another Thread Group implementation, for example Ultimate Thread Group where you can specify Initial Delay:

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Ultimate Thread Group can be installed as a part of the Custom Thread Groups bundle using JMeter Plugins Manager:

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You can achieve the same using Flow Control Action sampler, just add it as the first Sampler to your Thread Group and specify 10 minutes (or whatever) delay there

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  • Thank you. I will definitely use the ultimate thread group as well. But for now I have used the Multiple Thread Groups and in second thread group I have used the Flow Control Action and used Synchronising timer as a child of the Flow Control Action. Is It significant to use the synchronising timer with Flow Control Action ??
    – Rajan
    Commented Apr 15, 2020 at 8:27
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    If you just put the Flow Control Action - it will delay each thread (virtual user) separately. Introducing the Synchronizing Timer will act as a "rendezvous" point so JMeter will wait until all the threads are available and then all of them will start "waiting" for 10 minutes at the same time. See Using the JMeter Synchronizing Timer for more information.
    – Dmitri T
    Commented Apr 15, 2020 at 8:42
  • Okay Now I got It . Thanks a lot !! One Last question can you please tell me how I can read CSV data and place it in Number Of Threads (Users) in particular thread group ? Suppose I have set first Thread Group as threads count to 2 so I have to read 2 from the CSV file. I just don't want to hard code in the Thread Group also for all other thread groups.
    – Rajan
    Commented Apr 15, 2020 at 8:49

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