20 * 99 = 1980
average response = 1884
diff = 96ms or 
     = 1884/20 = 94.2 - 99 = 4.8 ms/request

Rememeber, JMeter is calculating actual throughput - this includes time
spent on the jmeter side doing stuff.  So, about 4.8 ms/request are
spent in context switching and other JMeter processing.

-Mike

On Thu, 2004-06-03 at 05:31, Ivan Rancati wrote:
> good morning,
> 
> I have some beginner doubts on how exactly to read measurements for a 
> simple Fast CGI website (or perhaps I don't understand how to use 
> loops), and I did not find an exact answer on the documentation.
> My test plan is simple, I have a thread group with 20 threads, no ramp 
> up time, loop 15 times
> then
> Interleave controller (ignore sub-controller blocks is selected)
>     HTTP request 1
>     HTTP request 2
>     HTTP request 3
>     HTTP request  4
> View Results in table
> View results in tree
> Aggregate report
> 
> the 4 http requests go to FastCGI pages that have very similar execution 
> times, and for each page I have a simple Response Assertion (same for 
> all 4 pages)
> 
> At the end of the run, View results in Table gives me an average of 1884 
> ms for the 300 samples.
> Aggregate Report gives me a thoughput rate between 2.2/sec and 2.8/sec 
> for each of the 4 http requests, and a total rate of 10.1/sec.
> 
> Now, if 10.1 total requests are processed in a second, and I have 20 
> threads, where does the average sample time of 1884 ms come from? I 
> would expect something like
> 99 ms (since throughput is 10.1 requests in a second), or
> 1980, which is 99 ms times 20 (the number of threads)
> 
> Also, occasionally, in View Results in Table, I see a sample time of 0 
> ms, which looks odd.
> 
> I am running JMeter 2.0.1 on German Windows 2000 (with latest service 
> packs) and JVM 1.4.2_04. The server is a Linux box with Apache and Fast CGI
> 
> Apologies if this is already covered in some faq or in the docs, I could 
> not find it.
> 
> thanks and best regards,
> Ivan Rancati
> QA engineer - SharpMind.de
> 
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-- 
Michael Stover <[EMAIL PROTECTED]>
Apache Software Foundation


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