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Posted to dev@activemq.apache.org by "Kevin Yaussy (JIRA)" <ji...@apache.org> on 2008/02/04 14:43:35 UTC
[jira] Commented: (AMQ-1231) Performance issues with
org/apache/activemq/broker/region/PrefetchSubscription.java and
org/apache/activemq/store/kahadaptor/KahaTopicMessageStore.java
[ https://issues.apache.org/activemq/browse/AMQ-1231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=41218#action_41218 ]
Kevin Yaussy commented on AMQ-1231:
-----------------------------------
Rob, sorry for the delay in responding. I've taken the 1/17/2008 snapshot and have been testing with that for the last couple weeks. Base Kaha performance actually seems better, anyway. So, I think what you've got is good.
Thanks.
Kevin.
> Performance issues with org/apache/activemq/broker/region/PrefetchSubscription.java and org/apache/activemq/store/kahadaptor/KahaTopicMessageStore.java
> -------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-1231
> URL: https://issues.apache.org/activemq/browse/AMQ-1231
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 5.0.0
> Reporter: Kevin Yaussy
> Assignee: Rob Davies
> Fix For: 5.1.0
>
> 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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