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I need to make a random pause of 2 to 5 seconds between requests. I suppose, that it is a constant timer with such settings as ${__Random(2000,5000)}. I can't understand where should I create this timer: in thread group after all requests, or after every request in thread group? How can I check via listeners, that timer works correctly?

Thanks to Amol, I understood, that my config doesn't work with multiple threads.

So I need 10 threads and 10 iterations with a random pause of 2 to 5 seconds between requests.

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  • Does your thread-group have only one request?
    – Amol Chavan
    Jun 21, 2020 at 17:44
  • There are several requests.
    – Denis Filatov
    Jun 22, 2020 at 15:21

1 Answer 1

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If you want to have a random pause between every request, you need to add timer as 'sibling' to your samplers [requests], that means add constant timer as a child to thread-group.

How to use Constant Timer for random pause-

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It won't make any difference if you add it as a first child or after all samplers. For better understanding, I suggest you to read scoping in Jmeter

Example here:-

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You can easily see the randomness requests being made using View Results in Table. it has Start Time column which gives idea. I have used debug sampler for example again:

enter image description here

Hope this helps.

EDIT:-

If I disable the constant-timer, I can see all the request being made in the span of 1ms:

enter image description here

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    Thanks for your answer, Amol. How can I check that timer works correctly? If I check "View Results in Table" I can see, that all request go without configured random pause.
    – Denis Filatov
    Jun 21, 2020 at 16:59
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    @DenisFilatov : Are you facing any issue?
    – Amol Chavan
    Jun 21, 2020 at 17:09
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    If number of threads 1, it works correctly. If number of threads 10, I can see similar behavior as on 4th screen.
    – Denis Filatov
    Jun 21, 2020 at 17:15
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    That can happen as scoping is on thread-group, In the above example, we are saying that all the request in the same thread group should have some random pause time between 2 to 5 seconds, we are not talking about multiple threads.
    – Amol Chavan
    Jun 21, 2020 at 17:20
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    If you want to control the behaviour on multiple thread level, I suggest you to use Ramp Up
    – Amol Chavan
    Jun 21, 2020 at 17:24

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