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From Sherif Amer <sherif.moh.a...@gmail.com>
Subject Re: Jmeter Deviation
Date Sat, 03 Sep 2011 17:04:43 GMT
thanks for the reply, but can you help me to get the right data ?
last time i followed some steps i found on the web, so can you just guide me
how i can get the right data

On Sat, Sep 3, 2011 at 4:37 PM, sebb <sebbaz@gmail.com> wrote:

> 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:
> >> >> >> >> >> 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
> >> >> >> >> >> >> >>
> >> >> >> >> >> >> >>
> >> >> >> >> >> >> >
> >> >> >> >> >> >>
> >> >> >> >> >> >>
> >> >> >> >> >> >>
> >> >> >>
> >> >> >>
> ---------------------------------------------------------------------
> >> >> >> >> >> >> 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
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> ---------------------------------------------------------------------
> >> >> >> >> 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
> >> >> >> >
> >> >> >>
> >> >> >>
> >> >> >>
> ---------------------------------------------------------------------
> >> >> >> 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
> >> >>
> >> >>
> >> >
> >>
> >> ---------------------------------------------------------------------
> >> 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
> >
>
> ---------------------------------------------------------------------
> 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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