I think i've found something...
2008-09-24 08:00:01.148 GMT Thread[ActiveMQ ShutdownHook,5,main] (XID =
125), (SESSIONID = 2),
SELECT * FROM ACTIVEMQ_LOCK FOR UPDATE
******* Table Scan ResultSet for ACTIVEMQ_LOCK at read committed isolation
level using exclusive row locking chosen by the optimizer
This is the only unusual query i've found.
Can this query block the checkpoint?
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