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What are threads in JMeter?
A Thread Group is a set of threads executing the same scenario. It is the base element for every JMeter test plan. There are multiple thread groups available which can be configured to simulate how the users interact with the application, how the load is maintained and over what period of time.
How does JMeter handle multiple threads?
Concerning consecutive execution of thread groups in test plan: simple check Run Test Group consecutively check-box on the Test Plan configuration screen:
- Use e.g. Loop Controller for this:
- Use Number of Threads property of standard Thread Group for this together with Ramp-Up Period property:
How does the thread group work in JMeter?
Thread Group element helps to define a performance test scenario in JMeter. In Thread Group GUI, you can control the number of simulated users (threads), the ramp-up time (how long it takes to start all the threads), the loop count (or iteration count, and optionally, a start and stop time for the test.
What’s the difference between JMeter and loop count?
Most people are aware of the fact that a thread simulates a user and loop-count means the number of times the thread will make request. Let’s walk through the differences. In Scenario 1, 10 threads are used, and the ramp-up period is 10 seconds, so JMeter will take 10 seconds to get all 10 threads up and running.
How many threads are there in Apache JMeter?
If there are 10 threads and ramp-up time of 100 seconds then each thread will be initiated at the interval of 10 seconds and at 100th second all the threads get started. Note: This is not the time between two threads to start-up. Loop Count: Number of times to iterate the test case.
How many threads does JMeter run in Scenario 2?
If there are 30 threads and a ramp-up period of 120 seconds, then each successive thread will be delayed by 4 seconds. In Scenario 2 JMeter will run 1 thread, and after the completion of one thread, the next one will start, and so on 10 times.