What does Average value mean in Summary Report in Jmeter?

Question

I Have a Thread Group created in my Test Plan. I have set the Thread Group to run 20 Threads with Ramp Up Period as 0 and Loop Count as 1.

Now i have created 5 JDBC Sampler Request each which runs different queries against the same Database, so when i start the test , it should kick start 100 queries (20 * 5)

I also generated a Summary report and copied pasted parts of that report.

Sampler Label          No of Requests per Sampler   Average( in milliseconds)
-------------          --------------------------      --------------------------
MYSQL JDBC Request 1    20                         8571
MySQL JDBC Request 2    20                         5154
MySQL JDBC Request 3    20                         5927
MySQL JDBC Request 4    20                         1290
MySQL JDBC Request 5    20                         1449
TOTAL                   100                        4478

In the Summary Report taht i have compiled above, what does average of 4478 milliseconds mean? Does this mean that it took 4478 milliseconds to run 20 threads on an average ? or does it mean that it took 4478 milliseconds to run 100 queries?..can someone help me here. I could not find this information anywhere in the Jmeter apache documentation.

Thanks in advance.

Answer 1

As per this documentation:

• https://jmeter.apache.org/usermanual/component_reference.html#Summary_Report

Average : The average elapsed time of a set of results

So it means its it:

Sum of all request's response time / total number of requests