How to add rendezvous point in jmeter

Question

I have a scenario in which I want to hit first request with 3000 users and wait for all the users to come at a point and hit the second request at a same time. How can this be achievable in jmeter.

Answer 1

You could write the first request in its own ThreadGroup wich loops 3000 times, then the 2nd request in an other ThreadGroup.

If you tick the Run Test Group consecutively check-box on the Test Plan configuration screen:

Then what you ask will happen.

You'll have to pass the user states somehow, maybe using variables?

Answer 2

Alternatively you could have a global variable user_setup_count and an absolute rendez_vous_time, to be used like this (for each Thread, in a single ThreadGroup):

• Perform request1
• Increment user_setup_count - Set rendez_vous_time to now + 20s
• while (user_setup_count <3000) { Not everyone is ready yet!
  • Sleep for 5 sec
• Sleep exactly until rendez_vous_time <-- Synchronization is here
• Perform request 2
• etc.

Answer 3

JMeter's equivalent of rendezvous point is Synchronizing Timer. Add it as a child of the request you need to execute by all users and use 3000 as the "Number of Simulated Users to Group By"