[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

["Rob Davies (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/activemq/browse/AMQ-921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rob Davies reassigned AMQ-921:
------------------------------

    Assignee: Rob Davies

> 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: 4.1.0
>         Environment: Any
>            Reporter: Nikolai Penkov
>            Assignee: Rob Davies
>            Priority: Minor
>             Fix For: 5.1.0
>
>
> 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...

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.