concurrency test

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concurrency test

冒险王拉达
Hi,
I'm doing things about concurrency test. I wondered what the difference between the two situations below is:
1.Set Thread Number of Thread Group to 10, and set Ramp-Up Period(in seconds) to 0.
2.Set Thread Number of Thread Group to 10, and set Ramp-Up Period(in seconds) to 1. Add a Synchronizing Timer, and set Number of Simulated Users to Group by to 0 and set Timeout in milliseconds to 2.


I think the concurrency of the two test situations are 10. Is it right or not? Why?


Thank you!
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Re: concurrency test

glinius@live.com
The concurrency in both cases is the same as Synchronizing Timer doesn't do
anything given you set 0 as the Number of Simulated Users to Group by.

With regards to "10" - it's a big question mark and it mostly depends on
your application response time. Given you have only 1 loop at  Thread Group
<https://jmeter.apache.org/usermanual/component_reference.html#Thread_Group>  
level you may run into a situation when some requests have not been yet
started and some are completed already.

The actual concurrency can be checked using i.e.  Active Threads Over Time
<https://jmeter-plugins.org/wiki/ActiveThreadsOverTime/>   listener.

You can easily manipulate the desired concurrency using  Concurrency Thread
Group <https://jmeter-plugins.org/wiki/ConcurrencyThreadGroup/>  

Both the aforementioned plugins can be installed using  JMeter Plugins
Manager
<https://www.blazemeter.com/blog/how-install-jmeter-plugins-manager/>  



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