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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-6726) Change flow to disk trigger to consider direct memory occupancy
Date Tue, 08 Sep 2015 12:29:46 GMT

    [ https://issues.apache.org/jira/browse/QPID-6726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14734727#comment-14734727

ASF subversion and git services commented on QPID-6726:

Commit 1701786 from orudyy@apache.org in branch 'java/trunk'
[ https://svn.apache.org/r1701786 ]

QPID-6726: [Java Broker] Use reflection for getting maxDirectmemorySize with HotSpotDiagnosticMXBean
and fall back to evaluation of maxDirectmemorySize from command line arguments when HotSpotDiagnosticMXBean
is not not available in JVM

work by Lorenz Quack <quack.lorenz@gmail.com> and Alex Rudyy <orudyy@apache.org>

> Change flow to disk trigger to consider direct memory occupancy
> ---------------------------------------------------------------
>                 Key: QPID-6726
>                 URL: https://issues.apache.org/jira/browse/QPID-6726
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Broker
>    Affects Versions: qpid-java-6.0
>            Reporter: Alex Rudyy
>            Assignee: Alex Rudyy
>             Fix For: qpid-java-6.0
>         Attachments: Tmp.java
> Currently, flow to disk to triggers when a queue/virtualhost breaches a target size where
the target size is 40% of the Broker's maxMemory.
> Message payload/headers are now stored in direct memory so considering the occupancy
of heap is no longer appropriate. We need to change the algorithm to consider direct memory
occupancy or the occupancy of the buffers allocated within direct memory.
> Note: We need to ensure that we leave sufficient direct memory for other usages such
as Jetty.

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