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From "Claus Ibsen (JIRA)" <>
Subject [jira] [Commented] (AMQ-3931) Memory problems with large transactions
Date Wed, 19 Sep 2012 12:15:07 GMT


Claus Ibsen commented on AMQ-3931:

See also this ticket. KahaDB has a special option for overflow to disk for TX
> Memory problems with large transactions
> ---------------------------------------
>                 Key: AMQ-3931
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.6.0
>         Environment: OS: RHEL 5.5
> Startup options: -Xmx2G -Xms2G -XX:MaxPermSize=512M -Dorg.apache.activemq.UseDedicatedTaskRunner=true -Dactivemq.classpath=/opt/activemq/conf;
-Dactivemq.home=/opt/activemq -Dactivemq.base=/opt/activemq -Dactivemq.conf=/opt/activemq/conf
> Config file: activemq.xml attached
>            Reporter: Robert Voliva
>            Assignee: Claus Ibsen
>             Fix For: 5.7.0
>         Attachments: activemq_log_output.txt, gbsmq.xml
> When running a single transaction that produces 300,000 text messages, ActiveMQ runs
into all sorts of memory problems.  The log output is attached.  We were using a simple Java
JMS client class to produce the 300,000 messages in a single transaction.  Each message's
text payload was a random string of 10,000 bytes.
> This is a production scenario that we have that's killing our broker.  We isolated it
down to its most basic pieces to try to test where the breakdown was occuring, which led us
to this.

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