Oracle 10g RAC resource usage VERY high from the passive servers keepAlive
requests to the Database.
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Key: AMQ-2520
URL: https://issues.apache.org/activemq/browse/AMQ-2520
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.3.0
Environment: Redhat Enterprise Linux 5, Oracle 10g RAC
Reporter: Tom
Priority: Blocker
Two active MQ brokers are installed on RH EL 5 servers (one per server).
They're configured as a JDBC master / slave failover (as per examples).
Failover is tested and working and messages delivered.
Oracle is used for synchronisation (ACTIVEMQ_ tables), persistence etc.
We run a durable subscriber, and the client connects via a failover operation.
After a short period Oracle dashboard shows a high number of active sessions
from Active MQ due to the continuous execution of
UPDATE ACTIVEMQ_LOCK SET TIME = ? WHERE ID = 1
in the keepAlive method in
https://svn.apache.org/repos/asf/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/store/jdbc/DatabaseLocker.java
As a workaround we've had to push out the lockAcquireSleepInterval to 5 minutes
in the configuration of ActiveMQ.
<jdbcPersistenceAdapter dataSource="#oracle-ds" useDatabaseLock="true"
lockAcquireSleepInterval="300000" createTablesOnStartup="true"/>
Any suggestions to this issue?
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