On 06/09/2008, Ian Blavins <[EMAIL PROTECTED]> wrote: > G'day > > > > I've been trying to identify the cause of a major loss of throughput in > my JMeter scripts (note, in the throughput of the scripts through the > JMeter engine, not loss of throughput on the target server). > > > > It appears the If controller is very expensive in JMeter throughput > terms. >
Could well be so - it has to create a Javascript interpreter. > > If I wrap the sampler call of an existing test plan with an If > controller that has an expression of "true" == "true" then the > throughput of my scripts drops from around 36,000 scripts per second to > around 2,200 scripts per second. > How many threads? > > This is jmeter 2.3.1 with the client on Windows XP and remote jmeter > hosts on an IBM p570 running AIX. > Current version is 2.3.2 > > > Is there a known slowness in the If controller ? > What happens if you replace the If Controller with a simple controller or a loop controller with count=1? That would be a fairer comparison. > > > > (These are test scripts designed to determine how to get high JMeter > throughput so they don't do very much. In my real scripts half the > expression is of course a variable computed in earlier test plan steps.) > > > > I can easily get around this since my sampler is a custom written Java > sampler. I just have to pass the test variable into the sampler and let > it decide whether to execute. > > > > > > > > Ian Blavins > Software performance specialist > > . > > TEMENOS > The Banking Software Company > > . > > PeopleBuilding 2, Maylands Av > > Hemel Hempstead UK HP2 4NW > > . > > T: +44 (0) 1442 431 106 > E: [EMAIL PROTECTED] > > . > > www.temenos.com <http://www.temenos.com> > > . > > P Consider the environment. Please don't print this e-mail unless you > really need to. > > > > > Disclaimer: > If you have received this e-mail in error please notify the sender. > Please note that any views or opinions presented in this e-mail are solely > those of the author and do not necessarily represent those of TEMENOS. > We recommend that you check this e-mail and any attachments against viruses. > TEMENOS accepts no liability for any damage caused by any malicious code > or virus transmitted by this e-mail. > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
