In jmeter How to configure test plan with different duration and threads rampup

Question

In my JMeter test plan, I aim to execute three user groups over an 11-hour(39600 seconds )duration. For the first user group, I intend to add a new thread every 60 seconds. For the second group, the plan is to add 1 thread every 2 seconds. And third group 2 threads every 1 second

How can I configure the Thread Groups to achieve this specific thread addition pattern over the defined test duration?

Answer 1

As per JMeter documentation:

The ramp-up period tells JMeter how long to take to "ramp-up" to the full number of threads chosen. If 10 threads are used, and the ramp-up period is 100 seconds, then JMeter will take 100 seconds to get all 10 threads up and running. Each thread will start 10 (100/10) seconds after the previous thread was begun. If there are 30 threads and a ramp-up period of 120 seconds, then each successive thread will be delayed by 4 seconds.

With "normal" Thread Group you need to set or let us know the total number of users in order to be able to calculate ramp-up period.

For example if you have 60 users:

• new thread every 60 seconds - ramp-up period would be 3600
• 1 thread every 2 seconds - ramp-up period would be 120
• 2 threads every 1 seconds - ramp-up period would be 30

If you change the number of users - amend the ramp-up period proportionally/accordingly.

More information: JMeter Ramp-Up Period: The Ultimate Guide

You might also find Custom Thread Groups JMeter Plugins Bundle useful, they provides visual way of controlling ramp-up, ramp-down, time to hold the load, spikes, etc. It might be easier for your to use.