performance testing - How jmeter execute threads? -

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i have set per following :

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- users : 20 ramp-up period : 30 loop count :1

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what means thread group 1-2 , 1-3 ... how jmeter consider 20 user execute request?

when jmeter script runs , can see following in log viewer :

2014/11/27 03:45:59 info - jmeter.threads.jmeterthread: thread started: thread group 1-2 2014/11/27 03:46:00 info - jmeter.threads.jmeterthread: thread started: thread group 1-3 2014/11/27 03:46:02 info - jmeter.threads.jmeterthread: thread started: thread group 1-4 2014/11/27 03:46:03 info - jmeter.threads.jmeterthread: thread started: thread group 1-5 2014/11/27 03:46:05 info - jmeter.threads.jmeterthread: thread started: thread group 1-6 2014/11/27 03:46:06 info - jmeter.threads.jmeterthread: thread started: thread group 1-7 2014/11/27 03:46:08 info - jmeter.threads.jmeterthread: thread started: thread group 1-8 2014/11/27 03:46:09 info - jmeter.threads.jmeterthread: thread started: thread group 1-9 2014/11/27 03:46:11 info - jmeter.threads.jmeterthread: thread started: thread group 1-10 2014/11/27 03:46:12 info - jmeter.threads.jmeterthread: thread started: thread group 1-11 2014/11/27 03:46:14 info - jmeter.threads.jmeterthread: thread started: thread group 1-12 2014/11/27 03:46:15 info - jmeter.threads.jmeterthread: thread started: thread group 1-13 2014/11/27 03:46:17 info - jmeter.threads.jmeterthread: thread finished: thread group 1-1 2014/11/27 03:46:17 info - jmeter.threads.jmeterthread: thread started: thread group 1-14 2014/11/27 03:46:18 info - jmeter.threads.jmeterthread: thread started: thread group 1-15 2014/11/27 03:46:20 info - jmeter.threads.jmeterthread: thread started: thread group 1-16 2014/11/27 03:46:21 info - jmeter.threads.jmeterthread: thread started: thread group 1-17 2014/11/27 03:46:22 info - jmeter.threads.jmeterthread: thread finished: thread group 1-2 2014/11/27 03:46:23 info - jmeter.threads.jmeterthread: thread started: thread group 1-18 2014/11/27 03:46:24 info - jmeter.threads.jmeterthread: thread started: thread group 1-19 2014/11/27 03:46:26 info - jmeter.threads.jmeterthread: thread started: thread group 1-20 2014/11/27 03:46:27 info - jmeter.threads.jmeterthread: thread finished: thread group 1-3 2014/11/27 03:46:37 info - jmeter.threads.jmeterthread: thread finished: thread group 1-4 2014/11/27 03:46:41 info - jmeter.threads.jmeterthread: thread finished: thread group 1-5 2014/11/27 03:46:43 info - jmeter.threads.jmeterthread: thread finished: thread group 1-6 2014/11/27 03:47:09 info - jmeter.threads.jmeterthread: thread finished: thread group 1-7 2014/11/27 03:47:25 info - jmeter.threads.jmeterthread: thread finished: thread group 1-8 2014/11/27 03:47:26 info - jmeter.threads.jmeterthread: thread finished: thread group 1-9 2014/11/27 03:47:32 info - jmeter.threads.jmeterthread: thread finished: thread group 1-10 2014/11/27 03:47:40 info - jmeter.threads.jmeterthread: thread finished: thread group 1-11 2014/11/27 03:47:51 info - jmeter.threads.jmeterthread: thread finished: thread group 1-12 2014/11/27 03:47:58 info - jmeter.threads.jmeterthread: thread finished: thread group 1-13 2014/11/27 03:48:06 info - jmeter.threads.jmeterthread: thread finished: thread group 1-15 2014/11/27 03:48:07 info - jmeter.threads.jmeterthread: thread finished: thread group 1-14 2014/11/27 03:48:11 info - jmeter.threads.jmeterthread: thread finished: thread group 1-16 2014/11/27 03:48:15 info - jmeter.threads.jmeterthread: thread finished: thread group 1-17 2014/11/27 03:48:16 info - jmeter.threads.jmeterthread: thread finished: thread group 1-18 2014/11/27 03:48:17 info - jmeter.threads.jmeterthread: thread finished: thread group 1-19 2014/11/27 03:48:18 info - jmeter.threads.jmeterthread: thread finished: thread group 1-20

jmeter java application uses multithreading.

since thread group settings are: users : 20 ramp-up period : 30 loop count :1

so create 20 threads representing 20 users, , each user execute thread group 1 time.

since have 1 thread group in test plan, why log shows

thread started: thread group 1-1, thread group 1-2, thread group 1-3 ..........

the second number represents user.

hope help.


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