The Min Max and Avg are calculated on individual sample times.
On 04/05/07, Ivan Neto <[EMAIL PROTECTED]> wrote:
Hi Oliver!
Thanks for your answer!
On 5/4/07, Oliver Erlewein (DSLWN) <[EMAIL PROTECTED] > wrote:
>
> Hi Ivan,
>
> Not quite sure whether this is what you're after but here goes... (I
> don't have coding know-how of JMeter though!!):
>
> 1000 / 4.6 = 217.39/s
> 2000 / 4.6 = 434.78/s
>
> The differences to the values below is probably the rounding error in
> the 4.6 seconds (@Sebb: might pay to make that double digit after the
> delimiter).
In fact I'm not sure how the average time ("Avg:") is calculated when
there's more than one thread. I think that the average time should be:
total_execution_time_of_all_threads / total_number_of_requests
So, if my test plan starts two threads, each of them executing 1000 HTTP
requests, and each thread runs for 4.6 seconds, then the average time per
request should be:
(4.6 + 4.6) / (1000 + 1000) = 0.0046 seconds = 4.6 milliseconds
Does this make any sense?
Regards,
Cheers Oliver
>
> -----Original Message-----
> From: Ivan Neto [mailto:[EMAIL PROTECTED]
> Sent: Friday, 4 May 2007 13:37
> To: [email protected]
> Subject: I'm not understanding the "Generate Summary Results" output
>
> Hi,
>
> I'm not understanding the numbers printed by "Generate Summary Results".
> If I run JMeter with the following configuration:
>
> Number of Threads: 1, Ramp-up Period: 0, Loop count: 1000
>
> I get the following response on System.out (my test plan makes only one
> HTTP
> request):
>
> Generate Summary Results = 1000 in 4.6s = 218.6 /s Avg: 4 Min:
> 1
> Max: 119 Err: 0 (0.00%)
>
> As far as I know, the average time should be calculated as:
>
> total_time / number_of_requests = 4.6 / 1000 = 0.00046s ~ 4 ms
>
> But when I execute the same thread group with another configuration
> (changed the number of threads):
>
> Number of Threads: 2, Ramp-up Period: 0, Loop count: 1000
>
> I get the following response on System.out:
>
> Generate Summary Results = 2000 in 4.6s = 439.2/s Avg: 3 Min:
> 1
> Max: 43 Err: 0 (0.00%)
>
> I now have 2000 requests in the same 4.6 seconds (as in the first
> output).
> But the average time is not 4.6 / 2000 = 0.00023 = 2.3 ms. How does
> JMeter calculate the average time when there are multiple threads?
>
> Thanks in advance.
>
> --
> Ivan Neto
>
--
Ivan Neto
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