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https://issues.apache.org/jira/browse/QPID-6803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15542484#comment-15542484
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Keith Wall commented on QPID-6803:
----------------------------------
Examination shows that this change has reduced the memory requirements for the
Broker, especially for the 0-8..0-91 use-case. We are know able to
accommodate more than 500,000 queue entries (*) in heap (default memory
settings), vs. 320,000 before this change.
> ByteBuffer slices/duplicates contribute significantly to garbage overhead in
> busy Brokers
> -----------------------------------------------------------------------------------------
>
> Key: QPID-6803
> URL: https://issues.apache.org/jira/browse/QPID-6803
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Reporter: Keith Wall
> Assignee: Keith Wall
> Fix For: qpid-java-6.1
>
>
> Profile whilst running auto-ack/transacted test at higher messages rates
> shows that the garbage collection is dominated being dominated by
> DIrectByteBuffers resulting from slicing/duplicating.
> We could refactor QpidByteBuffer (maintaining our own
> remaining/capacity/limit and keeping a reference to the original buffer)
> ourselves to avoid this overhead.
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