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From sebb <seb...@gmail.com>
Subject Re: Jmeter Deviation
Date Sat, 03 Sep 2011 15:37:45 GMT
There are only 20 top-level entries in the data file you sent; the
average is 73 and std.dev is 50.

15 of the samples are redirects, which have 2 child entries, so in
fact there were 35 individual samples originally.
When processed as such (I removed the parent samples from the file),
the average is 41 and the deviation is 41

Neither interpretation bears any relation to the question you asked
(40 samples, average 142)
Did you send the wrong file?

If you want people to help, you have to provide relevant and accurate data.

On 2 September 2011 19:37, Sherif Amer <sherif.moh.amer@gmail.com> wrote:
> Kindly find the attached raw data, i am so sorry but actually i need help
> and i am new with jmeter :(
>
> On Fri, Sep 2, 2011 at 4:46 PM, sebb <sebbaz@gmail.com> wrote:
>>
>> On 2 September 2011 16:25, Sherif Amer <sherif.moh.amer@gmail.com> wrote:
>> > i got the values from the graph and i calculated it and i got the
>> > population
>> > standard deviation, it is totally different from the values which the
>> > table
>> > shows, can you try it please ?
>>
>> No, I cannot try it.
>>
>> You have not provided the raw data.
>>
>> > On Fri, Sep 2, 2011 at 3:51 PM, sebb <sebbaz@gmail.com> wrote:
>> >
>> >> On 2 September 2011 15:08, Sherif Amer <sherif.moh.amer@gmail.com>
>> >> wrote:
>> >> > thanks very much for the response, regarding "The aggregate graph
>> >> > does
>> >> not
>> >> > display the deviation" i calculated it manually :) and it is not the
>> >> > same
>> >> > one shown in the table.
>> >>
>> >> So what has the aggregate graph got to do with it then?
>> >>
>> >> And did you use the appropriate calculation, i.e. population standard
>> >> deviation?
>> >>
>> >> > regarding the bugzilla and the JTL can elaborate more details as it
>> >> > is my
>> >> > first time here :)
>> >>
>> >> Bugzilla: http://jakarta.apache.org/jmeter/issues.html
>> >>
>> >> JTL is the sample output file; may be in CSV or XML format.
>> >>
>> >> Without the sample data it's impossible to provide further help.
>> >>
>> >> > On Fri, Sep 2, 2011 at 1:53 PM, sebb <sebbaz@gmail.com> wrote:
>> >> >
>> >> >> On 2 September 2011 13:07, Sherif Amer <sherif.moh.amer@gmail.com>
>> >> wrote:
>> >> >> > 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
>> >> >> !!!
>> >> >>
>> >> >> The aggregate graph does not display the deviation, so I don't
>> >> >> understand what you mean.
>> >> >>
>> >> >> >   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 !!?
>> >> >>
>> >> >> Please provide the JTL results file - but do not send it to the
>> >> >> list.
>> >> >>
>> >> >> Create a bugzilla issue and attach the JTL file to that.
>> >> >> Make sure you explain what you see in the listeners and what you
>> >> >> expected to see.
>> >> >>
>> >> >> > On Thu, Sep 1, 2011 at 4:11 PM, sebb <sebbaz@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.amer@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 <sebbaz@gmail.com>
wrote:
>> >> >> >> >
>> >> >> >> >> On 1 September 2011 15:17, Sherif Amer
>> >> >> >> >> <sherif.moh.amer@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 <sebbaz@gmail.com>
>> >> >> >> >> > wrote:
>> >> >> >> >> >
>> >> >> >> >> >> On 1 September 2011 15:06, Sherif Amer
<
>> >> sherif.moh.amer@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 <sebbaz@gmail.com>
>> >> wrote:
>> >> >> >> >> >> >
>> >> >> >> >> >> >> On 1 September 2011 13:56,
Sherif Amer
>> >> >> >> >> >> >> <sherif.moh.amer@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
>> >> >> >> >> >> >> > <sebbaz@gmail.com>
>> >> >> wrote:
>> >> >> >> >> >> >> >
>> >> >> >> >> >> >> >> On 1 September 2011
13:43, Sherif Amer
>> >> >> >> >> >> >> >> <sherif.moh.amer@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:
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>> >> >> >> >> >> >> >> For additional commands,
e-mail:
>> >> >> >> >> jmeter-user-help@jakarta.apache.org
>> >> >> >> >> >> >> >>
>> >> >> >> >> >> >> >>
>> >> >> >> >> >> >> >
>> >> >> >> >> >> >>
>> >> >> >> >> >> >>
>> >> >> >> >> >> >>
>> >> >>
>> >> >> ---------------------------------------------------------------------
>> >> >> >> >> >> >> To unsubscribe, e-mail:
>> >> >> >> >> >> >> jmeter-user-unsubscribe@jakarta.apache.org
>> >> >> >> >> >> >> For additional commands, e-mail:
>> >> >> >> >> >> >> jmeter-user-help@jakarta.apache.org
>> >> >> >> >> >> >>
>> >> >> >> >> >> >>
>> >> >> >> >> >> >
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >>
>> >> >> ---------------------------------------------------------------------
>> >> >> >> >> >> To unsubscribe, e-mail:
>> >> >> jmeter-user-unsubscribe@jakarta.apache.org
>> >> >> >> >> >> For additional commands, e-mail:
>> >> >> jmeter-user-help@jakarta.apache.org
>> >> >> >> >> >>
>> >> >> >> >> >>
>> >> >> >> >> >
>> >> >> >> >>
>> >> >> >> >>
>> >> ---------------------------------------------------------------------
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>> >> jmeter-user-unsubscribe@jakarta.apache.org
>> >> >> >> >> For additional commands, e-mail:
>> >> jmeter-user-help@jakarta.apache.org
>> >> >> >> >>
>> >> >> >> >>
>> >> >> >> >
>> >> >> >>
>> >> >> >>
>> >> >> >> ---------------------------------------------------------------------
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>> >> >> >> For additional commands, e-mail:
>> >> >> >> jmeter-user-help@jakarta.apache.org
>> >> >> >>
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > ---------------------------------------------------------------------
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>> >> >> > For additional commands, e-mail:
>> >> >> > jmeter-user-help@jakarta.apache.org
>> >> >> >
>> >> >>
>> >> >>
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>> >> >>
>> >> >>
>> >> >
>> >>
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>> >>
>> >>
>> >
>>
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>>
>
>
>
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