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From Sebastiano Spicuglia <spicuglia.sebasti...@gmail.com>
Subject Summariser throughput calculation
Date Thu, 26 Sep 2013 13:24:31 GMT
Hello all,

I have a question about the throughput calculation in Jmeter.

I set up a simple test plan and I configured jmeter to print information
about the throughput using the information found in:

http://jmeter.apache.org/usermanual/component_reference.html#Generate_Summary_Results

The results I got are the following:

summary +      1 in   0.2s =    4.6/s Avg:   218 Min:   218 Max:   218
Err:     0 (0.00%) Active: 3 Started: 3 Finished: 0
summary +     92 in   5.3s =   17.2/s Avg:   784 Min:   199 Max:  1409
Err:     0 (0.00%) Active: 34 Started: 34 Finished: 0
summary =     93 in   5.3s =   17.4/s Avg:   778 Min:   199 Max:  1409
Err:     0 (0.00%)
summary +    113 in   7.3s =   15.4/s Avg:  2068 Min:  1413 Max:  2638
Err:     0 (0.00%) Active: 60 Started: 60 Finished: 0
summary =    206 in  11.3s =   18.2/s Avg:  1485 Min:   199 Max:  2638
Err:     0 (0.00%)
summary +    130 in     9s =   14.7/s Avg:  2829 Min:  2461 Max:  3128
Err:     0 (0.00%) Active: 60 Started: 60 Finished: 0
summary =    336 in  17.4s =   19.3/s Avg:  2005 Min:   199 Max:  3128
Err:     0 (0.00%)
summary +    123 in     9s =   13.8/s Avg:  2878 Min:  2574 Max:  3082
Err:     0 (0.00%) Active: 60 Started: 60 Finished: 0
summary =    459 in  23.3s =   19.7/s Avg:  2239 Min:   199 Max:  3128
Err:     0 (0.00%)
summary +    127 in     9s =   14.3/s Avg:  2873 Min:  2554 Max:  3200
Err:     0 (0.00%) Active: 60 Started: 60 Finished: 0
summary =    586 in  29.3s =   20.0/s Avg:  2376 Min:   199 Max:  3200
Err:     0 (0.00%)
summary +    125 in     9s =   14.0/s Avg:  2876 Min:  2614 Max:  3090
Err:     0 (0.00%) Active: 60 Started: 60 Finished: 0
summary =    711 in  35.3s =   20.1/s Avg:  2464 Min:   199 Max:  3200
Err:     0 (0.00%)

I am a little bit lost here.

Why is the sum of all the intermediate intervals higher than final time?
If I did the math right the sum should be 48.8 while the final interval is 35.3.

Why is the final throughput (that should be the cumulative)  higher
than all the intermediate?

Could you please explain me how to read those results?

Thank you very much for you support and congratulation for your job
Best regards
Sebastiano

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