Hi,
I upgraded to 5.2.0 last week and witness my application performance dropped
substantially. I wrote a simple test which does:
producer:
loop
create a temporary reply queue
send a short object message to a non-persistent, non-durable queue
read from reply queue
delete the reply queue
consumer:
read the message
send the same object back to the reply queue
In 5.1, I get to 91 msg/s but in 5.2.0, I only get 17 msg/s
The configurations are pretty much identical between the two versions:
5.2: -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode
-Dorg.apache.activemq.UseDedicatedTaskRunner=false
5.1: -Xmx386m -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode
-Dorg.apache.activemq.UseDedicatedTaskRunner=false
prefetch=1 for both versions.
(Notes worthy: the test program producer/consumers are using the 5.2
activemq-all.jar, only the broker server is changed in the tests.)
I know the implication of the UseDedicatedTaskRunner and prefetch, but here
they are identical for both versions.
Why is there such a huge performance hit in 5.2?
Thanks
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