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From jns <>
Subject Store percent usage not decreasing - activemq.xml settings
Date Thu, 21 Oct 2010 00:58:02 GMT


I am fairly new to AMQ and am facing following issues:- 

1) Store percent usage does not decrease. It goes upto 50% and then very
slowly comes down to about 9% and stays there even after producer has
stopped sending messages. It never reaches back to 0%. I found this issue
even after specifying cleanupInterval=30000.

2) Memory percent usage jumps to 60% when 3 producers are sending about 350K
events each - continuously.

3) I have explicitly specified amqPersistenceAdapter . In that case, would I
be getting default values for configuration attributes of AMQ store. Eg:-
I have a single consumer - that is stable and many producers (continuous as
well as random timed)

Short version of activemq.xml looks like:- 

Seems xml format did not appear n previous post. This is short version of
activemq config file

                <amqPersistenceAdapter directory="activemq-data"
maxFileLength="30mb" />


                       memoryLimit="100mb" >
processExpired="false" />
                        producerFlowControl="false"  >

                            <strictOrderDispatchPolicy />
maximumSize="1000" />


        <!-- Use the following to configure how ActiveMQ is exposed in JMX
                createConnector="true" />
        <!--  The maximum amount of space the broker will use before slowing
down producers -->
            <systemUsage sendFailIfNoSpace="true">
                    <memoryUsage limit="350 mb" percentUsageMinDelta="20" />
                    <storeUsage limit="2 gb" name="foo"/>
                    <tempUsage limit="500 mb"/>

        <!-- The transport connectors ActiveMQ will listen to -->
            <transportConnector name="openwire" uri="tcp://"/>
            <!-- Uncomment to enable SSL connections
            <transportConnector name="ssl" uri="ssl://"/>


I am kind of stuck on above issues for a long duration now and would really
appreciate any help on them. Thanks 

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