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From the666pack <>
Subject Re: MDB performance tuning, configuration
Date Mon, 24 Mar 2008 12:03:51 GMT

ok as it is just a test server i had a quick "setup session" and got a clean
server again. i hope i dont run into the problem anymore now.. i will keep
some backup server just in case ;)

the666pack wrote:
> hallo,
> it seems i completely messed up with my MDB application now. i tried the
> "activation spec" that you mentioned and it worked fine. then i thought ia
> lso try to set the InstanceLimit to 0. so i went to the config.xml file
> and changed the "MDB\ Container\ InstanceLimit=0" wrong thing to do. after
> that i did not receive the wanted updates anymore in the database. i
> increased the value again to "maxPool" size.. and since that at startup of
> the server or at deploy time i always realize that some messages are
> delivered but then it stops again. i dont even send messages anymore, the
> messages that are delivered are from a test 2 hours ago!
> i also tried to restart the database, restart the server, computer,
> everything. and tried to start with an empty db. the only thing i realize
> is that at startup or deploytime of my application it sends some 10
> messages to the queue and after this it stops.
> by the way.. i already set the values back to their initial state.. but no
> effect.. i keep having this error and not possible to deliver any new
> messages.. just everytime i start i see more 10 values being changed in
> the database.
> can anyone help me, please.
> thanks,
> mario
> manucet wrote:
>> You may have tried this out but increasing the maxMessagesPerSession
>> activation config property will increase the prefetch size and
>> generally speed it up a bit more. I assume u have already increased
>> the maxSessions activation config property to increase the no of
>> parallel Mdb instances. Here is a link for the properties that AMQ
>> allows The
>> configurable OpenEJB properties are given here
>> Try setting the InstanceLimit property of the MdbContainer to 0 so
>> that the no of instances created matches the no of AMQ sessions
>> available. For setting this you need to set this as a system property.
>> The property should be containerId.InstanceLimit where containerId is
>> of the format  <artifactId>.<Resource Group Name>-<listener interface>
>> eg: org.apache.geronimo.configs/activemq-ra/2.2-SNAPSHOT/car.ActiveMQ
>> RA-javax.jms.MessageListener
>> ie <artifactId> =  artifactId of the jms RA
>> <Resource Group Name> - The resource Group name u gave while creating the
>> RA
>> <listener interface> - javax.jms.MessageListener in this case
>> So the property in this case can be set as
>> org.apache.geronimo.configs/activemq-ra/2.2-SNAPSHOT/car.ActiveMQ\
>> RA-javax.jms.MessageListener.InstanceLimit=0
>> Regards
>> Manu
>> On Sun, Mar 23, 2008 at 4:49 PM, the666pack <>
>> wrote:
>>>  hello,
>>>  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,
>>>  greetings,
>>>  mario
>>>  --
>>>  View this message in context:
>>>  Sent from the Apache Geronimo - Users mailing list archive at

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