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https://issues.apache.org/jira/browse/ARTEMIS-2224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16738471#comment-16738471
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ASF GitHub Bot commented on ARTEMIS-2224:
-----------------------------------------
Github user franz1981 commented on the issue:
https://github.com/apache/activemq-artemis/pull/2494
Most of the benefits on memory footprint are already explained on
https://github.com/qihongxu/activemq-artemis/pull/1, while about the contention
I have already built several contention graphs that shows that this
implementation scale linearly with the number of producers on a topic, without
any contention.
In addition, several JMH microbenchs (not attached here) shows that is
always fastest (if single-threaded too) then the original one for any
operations and in any condition.
The only missing bits is an end 2 end test after applying #2484
> Reduce contention on LivePageCacheImpl
> --------------------------------------
>
> Key: ARTEMIS-2224
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2224
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 2.7.0
> Reporter: Francesco Nigro
> Assignee: Francesco Nigro
> Priority: Major
>
> Has been measured that LIvePageCacheImpl operations are a source of
> contention on producer side while paging.
> This contention decrease the scalability of the broker in an evident way
> while using topics, because the page cache is been accessed concurrently by
> several producers to ack transactions while the messages are being appended.
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