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From the666pack <>
Subject MDB performance tuning, configuration
Date Sun, 23 Mar 2008 11:19:23 GMT


i am trying to test the performance of geronimo under load for message
driven beans. the observed behaviour is that i get a maximum of about 85
transactions per second. after this, tested with about 60 concurrent users,
the performance drops again to about 45 tps. i hoped to increase the
performance somehow.. things i already tried:

-increase the mdb pool size
-increase the thread pool size
-increase the connector-thread-pool-size

unfortunately nothing helped, the performance situation remains the same. 

another observed behaviour is that in the time of silence between tests the
server needs some time to fulfill the requests sent before. so i see it is
still working although i am not sending mdb-requests anymore. 

i suppose these are the requests that are still in the queue and have to be
finished. i think this is the reason for the performance drop with more
concurrent users. i would like to see it perform without this
"aftertime-working" and handle the requests "in time". 

maybe someone can give me a hint which other values could be important to
change for the performance of mdbs getting real good. i thank you very much
for your help,


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