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Posted to dev@activemq.apache.org by "Nikolai Penkov (JIRA)" <ji...@apache.org> on 2006/09/14 12:26:23 UTC
[jira] Created: (AMQ-921) When recovering messages on startup -
execution of Store.getMessage is executed as many times as many subscribers
to this destination there are
When recovering messages on startup - execution of Store.getMessage is executed as many times as many subscribers to this destination there are
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Key: AMQ-921
URL: https://issues.apache.org/activemq/browse/AMQ-921
Project: ActiveMQ
Issue Type: Improvement
Components: Broker
Affects Versions: 4.1
Environment: Any
Reporter: Nikolai Penkov
Priority: Minor
Fix of issue https://issues.apache.org/activemq/browse/AMQ-878 (when recovering gigantic queues) come to a new performance problem. - When recovering messages on startup - execution of Store.getMessage (from IndirectMessageRefference.incrementReferenceCount) is executed as many times as many subscribers to this destination there are. E.g.
1. Start of broker with a queue A with a lot of messages
2. Queue is recovered from database by creation of IndirectMessageRefferences
3. 2 Subscribers connect to recovered queue with two different message selectors.
4. Messages are loaded from database (IndirectMessageRefference.incrementReferenceCount -> destinationStore.getMessage) twice - for 2 subscribers...
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[jira] Assigned: (AMQ-921) When recovering messages on startup -
execution of Store.getMessage is executed as many times as many subscribers
to this destination there are
Posted by "james strachan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/activemq/browse/AMQ-921?page=all ]
james strachan reassigned AMQ-921:
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Assignee: Hiram Chirino
> When recovering messages on startup - execution of Store.getMessage is executed as many times as many subscribers to this destination there are
> -----------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-921
> URL: https://issues.apache.org/activemq/browse/AMQ-921
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 4.1
> Environment: Any
> Reporter: Nikolai Penkov
> Assigned To: Hiram Chirino
> Priority: Minor
>
> Fix of issue https://issues.apache.org/activemq/browse/AMQ-878 (when recovering gigantic queues) come to a new performance problem. - When recovering messages on startup - execution of Store.getMessage (from IndirectMessageRefference.incrementReferenceCount) is executed as many times as many subscribers to this destination there are. E.g.
> 1. Start of broker with a queue A with a lot of messages
> 2. Queue is recovered from database by creation of IndirectMessageRefferences
> 3. 2 Subscribers connect to recovered queue with two different message selectors.
> 4. Messages are loaded from database (IndirectMessageRefference.incrementReferenceCount -> destinationStore.getMessage) twice - for 2 subscribers...
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