Performance issues with
org/apache/activemq/broker/region/PrefetchSubscription.java and
org/apache/activemq/store/kahadaptor/KahaTopicMessageStore.java
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Key: AMQ-1231
URL: https://issues.apache.org/activemq/browse/AMQ-1231
Project: ActiveMQ
Issue Type: Improvement
Components: Broker
Affects Versions: 4.2.0
Reporter: Kevin Yaussy
Fix For: 4.2.0
Attachments: KahaTopicMessageStore.java, PrefetchSubscription.java
Using Solaris 10 DTrace, I found a couple intense synchronization pinch-points
in the Broker. Without altering the locking semantics, I converted the
synchronized methods and one synchronized code block to the JDK 1.5
ReentrantLock. There was a pretty significant performance benefit with this
change. I've attached the code, together with the old synchronized code
commented out for ease of change examination.
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