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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-6803) ByteBuffer slices/duplicates contribute significantly to garbage overhead in busy Brokers
Date Wed, 05 Oct 2016 11:57:20 GMT

    [ https://issues.apache.org/jira/browse/QPID-6803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548488#comment-15548488
] 

ASF subversion and git services commented on QPID-6803:
-------------------------------------------------------

Commit 1763439 from orudyy@apache.org in branch 'java/trunk'
[ https://svn.apache.org/r1763439 ]

QPID-6803: [Java Broker] Have SlicedQpidByteBuffer delegate operations to underlying direct
byte buffer

> 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
>
>         Attachments: 0001-QPID-6803-Use-underlying-direct-byte-buffer-for-sett.patch,
0002-QPID-6803-Use-underlying-direct-byte-buffer-for-read.patch
>
>
> 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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