OK, I think I've narrowed the problem down - it appears to be something in Apache (our web server) that is causing the pause. (I made this change based on the note that ba...@baassiri.ca sent asking if I was using HTTPS, I had to change the configuration to get off of HTTPS, and that allowed me to try some other test configurations.)
When I re-run the test but skip the Apache (AJP proxy) and go straight to the Tomcat, I get no slowdowns or pauses... It is _not_ a JMeter problem (near as I can tell). Also, I re-ran it so that I get the main page from the tomcat, and the 'embedded' resources from the Apache - and I get no slow downs. So if I had to guess, it is some sort of AJP configuration issue. I'll work on that now. Thank you all for your assistance! -- Robin D. Wilson Sr. Director of Web Development KingsIsle Entertainment, Inc. VOICE: 512-777-1861 www.KingsIsle.com -----Original Message----- From: Philippe Mouawad [mailto:philippe.moua...@gmail.com] Sent: Thursday, December 15, 2011 2:23 PM To: JMeter Users List Subject: Re: Strange 'pause' activity during testing Do you use CacheManager ? You should remove any plugin and activate GC logs to check it's not GC ? How is CPU on JMeter stack ? Regards Philippe On Thu, Dec 15, 2011 at 9:09 PM, Robin D. Wilson <rwils...@gmail.com> wrote: > >Maybe then there is a problem with the scanning of the HTML to > >extract the > embedded resources, or maybe one of the embedded resources is a tar-pit. > > If this were the case, I would expect the first sample to show the problem. > The fact that it does 600+ iterations without a problem - and _then_ > stalls seems like it rules out any problem with the returned HTML > (especially since the only difference in the returned result is the > username supplied by JMeter). > > >Do all the expected embedded resources get downloaded? > > Zero errors (even with the pauses there are no errors at all). > > >Are there any unusually long elapsed times for embedded resources? > > I see the 'max request duration' jump up right after the pause - but > it is only 10-11 seconds (not ~35 seconds like the pause). > > >Or large gaps between the parent sample download completion and the > >start > of the first embedded resource? > > Not that I can see... I'll see if I can get more detail on this. > > >That would suggest the page took a while to parse. > > I would assume that because this happens ~600+ iterations into the > test (the first time), that if it was related to parsing the page, I > would see it earlier in the test run cycle. And I wouldn't expect a > parsing problem to repeat on such a consistent basis - without > happening on every sample. > Right > now, if it is a parsing problem, it only happens the ~600th time it > sees the same page, which seems really surprising to me (then it > happens again after another ~600 iterations, etc.). Also, I would > expect the parser to take up some CPU and perhaps even some I/O > cycles, but the PerfMon shows idle during the pause period. > > >You'll need to select the optiion to "save subresults" in order to > >see the > embedded samples. > > ... > > > >BTW, you wrote you were running JMeter 2.4.1 - that does not exist, > >so > perhaps you meant the current version, 2.5.1? > > Sorry, I meant 2.4. I didn't upgrade to 2.5 (and beyond) because of a > previously reported problem where 2.5+ slows down my throughput to > about 60% of what I get on 2.4. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org > For additional commands, e-mail: user-h...@jmeter.apache.org > > -- Cordialement. Philippe Mouawad. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org For additional commands, e-mail: user-h...@jmeter.apache.org
