Hello, i re test the full test plan again and i got strange results for the average and for the deviation
i have 4 pages and i made 10 request per page so the result is 40 request when i show the result in table i got the Average = 142 and the deviation = 93 when i show the result in aggregate graph and i calculated the average and the deviation the results were different from the results on the table !!! in the graph the Average = 140 and the deviation = 41. any idea why the results are different even it is same number of requests and the same test plan !!? On Thu, Sep 1, 2011 at 4:11 PM, sebb <seb...@gmail.com> wrote: > Note that OpenOffice.org Calc has STDEV and STDEVP functions that > calculate the two different versions of std. dev.; I imagine Excel has > similar functions. > > On 1 September 2011 16:06, Sherif Amer <sherif.moh.a...@gmail.com> wrote: > > Thanks very much for the clarification, i will re create the full test > > scenario and update you. > > > > On Thu, Sep 1, 2011 at 3:37 PM, sebb <seb...@gmail.com> wrote: > > > >> On 1 September 2011 15:17, Sherif Amer <sherif.moh.a...@gmail.com> > wrote: > >> > view result in *table* > >> > >> OK, I see - you mean the figure in red at the bottom of the screen. > >> > >> I have just written a test using the Java sampler so I can ensure that > >> the correct times are created. > >> > >> I get the same average, but the deviation is calculated as 280, not 581 > or > >> 323. > >> Same if I use the Summary Listener. > >> > >> The JMeter value agrees with the "population standard deviation", > >> where the sum of square diffs is divided by the number of values (i.e. > >> 4) before taking the square root. > >> > >> The value 323 results from dividing the sum of squares diffs by 3 (= > >> 4-1) and then taking the square root. > >> This is the "sample standard deviation". > >> > >> Both are valid interpretations of standard deviation. Perhaps JMeter > >> should have used the latter, but it does not. > >> > >> I don't understand where the value 581 comes from. > >> If you still have the raw sample data, perhaps you can create a > >> Bugzilla issue and attach the JTL file with a screenshot of the Table > >> Listener. > >> > >> > On Thu, Sep 1, 2011 at 3:13 PM, sebb <seb...@gmail.com> wrote: > >> > > >> >> On 1 September 2011 15:06, Sherif Amer <sherif.moh.a...@gmail.com> > >> wrote: > >> >> > Which sampler were you using? > >> >> > *HTTP request* > >> >> > >> >> Sorry, I meant - which Listener were you using? > >> >> > >> >> > Which version of JMeter? > >> >> > *2.4* > >> >> > > >> >> > On Thu, Sep 1, 2011 at 2:21 PM, sebb <seb...@gmail.com> wrote: > >> >> > > >> >> >> On 1 September 2011 13:56, Sherif Amer <sherif.moh.a...@gmail.com > > > >> >> wrote: > >> >> >> > i made load test for 4 pages and the sample time was > >> >> 426,1093,1127,921 > >> >> >> and > >> >> >> > when i showed the result in table > >> >> >> > > >> >> >> > The average was 892 which is ok > >> >> >> > >> >> >> Agreed. > >> >> >> > >> >> >> > And the deviation was 581 which is totally wrong, if you > calculate > >> it > >> >> >> > yourself the result will simply will be 323. > >> >> >> > >> >> >> Which sampler were you using? > >> >> >> > >> >> >> Which version of JMeter? > >> >> >> > >> >> >> > On Thu, Sep 1, 2011 at 1:48 PM, sebb <seb...@gmail.com> wrote: > >> >> >> > > >> >> >> >> On 1 September 2011 13:43, Sherif Amer < > sherif.moh.a...@gmail.com > >> > > >> >> >> wrote: > >> >> >> >> > hello !! > >> >> >> >> > > >> >> >> >> > i have question :) does Jmeter calculating the the deviation > >> >> >> incorrectly > >> >> >> >> in > >> >> >> >> > the listener like the table and graphic shapes ? > >> >> >> >> > >> >> >> >> No. > >> >> >> >> > >> >> >> >> What makes you think the calculations are wrong? > >> >> >> >> > >> >> >> >> Please provide some evidence. > >> >> >> >> > >> >> >> >> > Regards, > >> >> >> >> > > >> >> >> >> > Sherif Amer > >> >> >> >> > > >> >> >> >> > >> >> >> >> > >> --------------------------------------------------------------------- > >> >> >> >> To unsubscribe, e-mail: > >> jmeter-user-unsubscr...@jakarta.apache.org > >> >> >> >> For additional commands, e-mail: > >> jmeter-user-h...@jakarta.apache.org > >> >> >> >> > >> >> >> >> > >> >> >> > > >> >> >> > >> >> >> > --------------------------------------------------------------------- > >> >> >> To unsubscribe, e-mail: > jmeter-user-unsubscr...@jakarta.apache.org > >> >> >> For additional commands, e-mail: > jmeter-user-h...@jakarta.apache.org > >> >> >> > >> >> >> > >> >> > > >> >> > >> >> --------------------------------------------------------------------- > >> >> To unsubscribe, e-mail: jmeter-user-unsubscr...@jakarta.apache.org > >> >> For additional commands, e-mail: jmeter-user-h...@jakarta.apache.org > >> >> > >> >> > >> > > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: jmeter-user-unsubscr...@jakarta.apache.org > >> For additional commands, e-mail: jmeter-user-h...@jakarta.apache.org > >> > >> > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: jmeter-user-unsubscr...@jakarta.apache.org > For additional commands, e-mail: jmeter-user-h...@jakarta.apache.org > >
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