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https://issues.apache.org/jira/browse/ARTEMIS-5383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Clebert Suconic closed ARTEMIS-5383.
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> Performance issues with HierarchicalRepositoryChangeListener
> ------------------------------------------------------------
>
> Key: ARTEMIS-5383
> URL: https://issues.apache.org/jira/browse/ARTEMIS-5383
> Project: ActiveMQ Artemis
> Issue Type: Task
> Affects Versions: 2.37.0
> Reporter: Josh Byster
> Assignee: Justin Bertram
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.41.0
>
> Attachments: Screenshot 2025-04-04 at 1.57.32 PM.png
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> On brokers with many queues, we find that upon disconnects of many components
> simultaneously, the broker immediately begins to slow. My suspicion is due to
> the queue auto-deletion behavior, where we do an {{ArrayList#remove(Object)}}
> in {{HierarchalObjectRepository#unRegisterListener}} which I believe is
> linear at least in the number of queues. With over a million queues, this
> becomes incredibly slow. Perhaps we can optimize the find of these listeners
> (maybe a map with an ID)?
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