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From Stanton W Derry <de...@cpt.com>
Subject IF Controller degrading throughput
Date Thu, 08 Dec 2011 18:18:16 GMT
I'm using JMeter 2.5.1 r1177103 and noticed when an If Controller is 
used it degrades the throughput till a full gc occurs at which time the 
throughput is back up. I used two different test scripts to verify this 
anomaly.

The test plans used are:

Thread Group 1 - Threads 40 - Forever - Duration -3600
     Sampler
     Sampler
     Sampler

and

Thread Group  2 - Threads 40 - Forever - Duration -3600
     Sampler
     IF Controller - ${JMeterThread.last_sample_ok}
             Sampler
     Sampler

The samplers response times are ~20ms and in the Summary Listener for 
Thread Group 1 see a total throughput of 1136.6/sec.  For Thread Group2 
the max reached is 714/sec, declines to about 600/sec, gc executed, and 
then climbs back to ~670 starting the cycle over.

Has anyone encountered a similar issue when using the IF Controller?

Thanks
Stan

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