On 30/01/2008, Lists <[EMAIL PROTECTED]> wrote: > Ok, we have the network stats directly from the switch. > > The port for the script server peaks at about 4% utilisation :) > > So i dont think it's network contention! > > I have noticed we do get up to 20,000 entries for TIME_WAIT in the netstat > list, not sure if thats significant. >
http://wiki.apache.org/HttpComponents/FrequentlyAskedConnectionManagementQuestions I'm not sure what happens if the JMeter host runs out of ports - does it report an error immediately, or does it time-out? If so, how long is the timeout? Might be worth experimenting with Keep-Alive - if enabled, the HttpClient sampler should re-use the connection (though of course the server might still close it). If it is possible, I guess it would be useful for JMeter to measure connection time, and perhaps try to keep track of the number of connections used in a thread. > --------- Original Message -------- > From: JMeter Users List <[email protected]> > To: JMeter Users List <[email protected]>, Lists > <[EMAIL PROTECTED]> > Subject: Re: Time spent where? > Date: 28/01/08 16:55 > > > 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] > > > > > > > > > > --------------------------------------------------------------------- > > 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] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
