This difference is a huge one for our system. We achieve average response times under normal load of 30-40ms end to end.
I dont think this is network contention. nicstat shows us the interface rarely gets above 20% utilisation. However i shall get the network admin guy to setup some logging so we can prove this. I will also look at apache stats and see how many mb's are transferred during the 10min test. --------- Original Message -------- From: sebb <[EMAIL PROTECTED]> To: JMeter Users List <[email protected]>, Lists <[EMAIL PROTECTED]> Subject: Re: Time spent where? Date: 28/01/08 16:48 > On 28/01/2008, Lists <[EMAIL PROTECTED]> wrote: > > > > > > How much longer? A few percent or much more? > > > > > > > significantly. an average of 89ms at the apache logs, and yet 140 at > > Does not seem too bad considering that the data has to be transferred > across the network. > > > jmeter. The key point is though that this latency is pratically zero at > > lower loads. The reason it causes us a problem is we define failure by > > saying 95% of responses must be less than a given response time - so this > > extra gap is seemingly causing us to fail the tests, but unnecessarily. > > Depends on the target of course. > > > > Are all samples affected? > > > > Err, good question, i've been looking at averages, so i dont know at this > > point. I guess i should look at standard deviation perhaps..? > > > > > Does the additional time depend on the sample size? > > > > Err, sample size? or throughput? yes it increases with throughput. > > > > I meant the number of bytes downloaded. > > Bigger samples generally take longer to download. > Some conditions (e.g. network contention) may affect larger samples > more than smaller ones as the transfer time is greater as a proportion > of total time. > > > > Note that the elapsed time will necessarily be longer than the apache > > > log time; the JMeter latency should be closer to the apache log > > > timings. > > > > > > Are you using any functions in the samplers? Function execution is > > > single-threaded. > > > > I'm not sure, i'll double check. However i have profiled jmeter recently > > and it didnt seem to be blocking - i do need to double check this, hopefully > > i'll do that tomorrow. > > > > > > > &gt; Thanks, > > > &gt; Dan > > > &gt; > > > &gt; ________________________________________________ > > > &gt; Message sent using UebiMiau 2.7.10 > > > &gt; > > > &gt; > > > &gt; > > > &gt; --------------------------------------------------------------------- > > > &gt; To unsubscribe, e-mail: [EMAIL PROTECTED] > > > &gt; For additional commands, e-mail: [EMAIL PROTECTED] > > > &gt; > > > &gt; > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > > > > ________________________________________________ > > Message sent using UebiMiau 2.7.10 > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > ________________________________________________ Message sent using UebiMiau 2.7.10 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
