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https://issues.apache.org/jira/browse/ARTEMIS-4809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17873669#comment-17873669
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ASF subversion and git services commented on ARTEMIS-4809:
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Commit 8b3874d613a02ce39e34bbed942d5978af94e89a in activemq-artemis's branch
refs/heads/main from Josh Byster
[ https://gitbox.apache.org/repos/asf?p=activemq-artemis.git;h=8b3874d613 ]
ARTEMIS-4809 Allow configuring initial queue buffer size
In some setups, there could be a few hundred thousand queues that are
created due to many consumers that are connecting. However, most of
these are empty and stay empty for the entire day since there aren't
necessarily messages to be sent. The 8K intermediateMessageReferences
instantiates an 64KB buffer (Object[]). This means we have large
allocation and live heap that ultimately remains empty for almost the
entire day.
In this commit, we introduce initial-queue-buffer-size, which defaults
to the current value of 8192. It can be set programmatically via
QueueConfiguration#setInitialQueueBufferSize(int).
Note that this must be a positive power of 2.
> Make intermediateMessageReferences initial capacity configurable
> ----------------------------------------------------------------
>
> Key: ARTEMIS-4809
> URL: https://issues.apache.org/jira/browse/ARTEMIS-4809
> Project: ActiveMQ Artemis
> Issue Type: New Feature
> Components: Broker
> Reporter: Josh Byster
> Priority: Minor
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> In some setups, there could be a few hundred thousand queues that are created
> due to many consumers that are connecting. However, most of these are empty
> and stay empty for the entire day since there aren't necessarily messages to
> be sent.
> The 8K {{intermediateMessageReferences}} instantiates an 64KB buffer
> ({{Object[]}}). This means we have large allocation and live heap that
> ultimately remains empty for almost the entire day.
> It would be quite nice if we could configure this initial size.
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