On 10/01/2010, Deepak Shetty <[email protected]> wrote: > hi > so what do you think is the cause behind latency being reported as 0(is it > the granularity)?
Yes > a quick glance through the code showed that latencyEnd is > not called if the content length isn't 0 and some property > httpsampler.obey_contentlength is set to true , but i dont think this > property is set by default Oops! No, that is not the default - I've run a test that shows non-zero latency for 200 and 304 status returns. > > regards > > deepak > > > On Sun, Jan 10, 2010 at 3:51 AM, sebb <[email protected]> wrote: > > > On 10/01/2010, Deepak Shetty <[email protected]> wrote: > > > I guess someone familiar with the code base would have to reply , I guess > > > latency may not be calculated if the status code is not in 2xx. > > > > Yes, it is calculated for both HTTP Samplers. > > > > > Alternately its possible that the latency is an extremely small value (< > > 1ms > > > which is the granularity for older JVMs) since the server is simply > > > returning you a status which is why you see zero(means less than 1 ms). > > > > Timer granularity may be a lot higher than 1ms. > > > > However, if the test plan is being run using Java 1.5 or later, the > > code will automatically use System.nanoTime() for elapsed time > > measurement, which should have much lower granularity. > > > > > regards > > > > > > deepak > > > > > > > > > On Sat, Jan 9, 2010 at 10:37 PM, Jatin <[email protected]> wrote: > > > > > > > You are correct deepak , I had redirects in the first sampler. > > Observerd > > > > the HTTP redirection status code in the view results listener. After > > > > removing that sampler i had latency being shown correctly. > > > > > > > > Again , why is the latency shown 0 for redirects as even the redirects > > > > traverse across the internet and it takes time for Jmeter to get them > > > > process them. > > > > > > > > > > > > Thanks > > > > Jatin > > > > > > > > Deepak Shetty wrote: > > > > > > > >> Hi > > > >> I tested against www.google.com and I dont see a zero latency. did > > you > > > >> verify with View Results Tree that you are indeed getting Google's > > home > > > >> page > > > >> (no redirects/errors or anything)? are you seeing this behavior for > > all > > > >> external sites? > > > >> > > > >> The elapsed time = latency +( time from 1st byte to last byte > > received). > > > >> Any combination of value is possible , with elapsed time always > > greater > > > >> than > > > >> latency. > > > >> > > > >> regards > > > >> deepak > > > >> > > > >> > > > >> On Sat, Jan 9, 2010 at 10:11 PM, Jatin <[email protected]> wrote: > > > >> > > > >> > > > >> > > > >>> I was testing from my home laptop. My internet speed is 256 kbps. I > > > >>> recorded the home page of google.com and was replaying it which had > > 9 > > > >>> samplers to access all the contents of the home page. I am confused > > on > > > >>> one > > > >>> point , the Elapsed time is mostly above 400ms for the first sampler > > > >>> where > > > >>> as the latency for this sampler is always 0 no matter how many times > > i > > > >>> loop. > > > >>> Both Elapsed time and latency have one thing in common which is that > > both > > > >>> take into account the delay happening because of the response > > getting > > > >>> from > > > >>> across the internet, then how come latency is 0 all the time while > > the > > > >>> elapsed time is more than 400ms for most of the time. > > > >>> > > > >>> Thanks > > > >>> Jatin > > > >>> > > > >>> > > > >>> Deepak Shetty wrote: > > > >>> > > > >>> > > > >>> > > > >>>> if you are testing this out within your intranet , its possible you > > > >>>> could > > > >>>> see extremely low or zero values. > > > >>>> regards > > > >>>> deepak > > > >>>> > > > >>>> On Sat, Jan 9, 2010 at 2:59 AM, Jatin <[email protected]> > > wrote: > > > >>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>>> Hi all > > > >>>>> > > > >>>>> I had a recorded script that will access the home page of a site. > > The > > > >>>>> listener that i was using was a graph results listener. I wanted > > to > > > >>>>> save > > > >>>>> the > > > >>>>> results in a csv file for only two variables namely: latency and > > > >>>>> Elapsed > > > >>>>> time. So in the configure dialog only selected these two > > parameters and > > > >>>>> obtained a csv file. > > > >>>>> > > > >>>>> My test plan organization was comprised of 9 HTTP samplers in one > > > >>>>> thread > > > >>>>> group with all the samplers put into a loop controller looping > > forever. > > > >>>>> For > > > >>>>> all the tests that were looping in the controller i noticed that > > for > > > >>>>> the > > > >>>>> first sampler the latency was always 0 even though the elapsed > > time was > > > >>>>> around 400ms but not less than that. Is the latency value correct > > since > > > >>>>> for > > > >>>>> both these parameters the response has to be fetched from the > > server > > > >>>>> and > > > >>>>> there could be delay in receiving the response. Please let me know > > if i > > > >>>>> am > > > >>>>> missing something here. > > > >>>>> > > > >>>>> Some test run samples are as below : > > > >>>>> > > > >>>>> 459,0 > > > >>>>> 140,137 > > > >>>>> 63,40 > > > >>>>> 179,134 > > > >>>>> 137,137 > > > >>>>> 120,120 > > > >>>>> 53,39 > > > >>>>> 40,40 > > > >>>>> 113,113 > > > >>>>> 275,0 > > > >>>>> 157,154 > > > >>>>> 62,40 > > > >>>>> 540,144 > > > >>>>> 149,148 > > > >>>>> 33,33 > > > >>>>> 53,38 > > > >>>>> 37,37 > > > >>>>> 113,113 > > > >>>>> 470,0 > > > >>>>> 159,155 > > > >>>>> 62,39 > > > >>>>> 178,133 > > > >>>>> 176,176 > > > >>>>> 120,120 > > > >>>>> 54,39 > > > >>>>> 38,37 > > > >>>>> 113,113 > > > >>>>> > > > >>>>> > > > >>>>> Thanks > > > >>>>> Jatin > > > >>>>> > > > >>>>> > > --------------------------------------------------------------------- > > > >>>>> To unsubscribe, e-mail: > > [email protected] > > > >>>>> For additional commands, e-mail: > > [email protected] > > > >>>>> > > > >>>>> > > > >>>>> > > > >>>>> > > > >>>>> > > > >>>>> > > > >>>> > > > >>>> > > > >>>> > > > >>> > > --------------------------------------------------------------------- > > > >>> To unsubscribe, e-mail: [email protected] > > > >>> For additional commands, e-mail: > > [email protected] > > > >>> > > > >>> > > > >>> > > > >>> > > > >> > > > >> > > > >> > > > > > > > > > > > > --------------------------------------------------------------------- > > > > To unsubscribe, e-mail: [email protected] > > > > For additional commands, e-mail: [email protected] > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
