[jboss-user] [JBoss Messaging] - Messaging and MySql performance issue

[jan44]

If we add a lot of messages to a queue (i.e. 500.000), and later when the messages has expired the database uses amost all of the CPU.
In MySql administrator we can see that the database is busy with a sql like this:
DELETE FROM JBM_MSG WHERE TIMESTAMP < 1194882127401 AND NOT EXISTS (SELECT * FROM JBM_MSG_REF WHERE JBM_MSG_REF.MESSAGE_ID = JBM_MSG.MESSAGE_ID).

There is no listener connected so all messages expires and no other software is connected to the database or to JBoss.

How can we resolve this?

We are using: JBoss application server 4.2.0 with JBoss Messaging 1.4.0 and MySQL 5.0.37

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