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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AMQ-4742) 64-bit Java wrapper ignores wrapper.java.maxmemory values over 4096mb
Date Wed, 30 Oct 2013 08:45:41 GMT

     [ https://issues.apache.org/jira/browse/AMQ-4742?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Claus Ibsen resolved AMQ-4742.
------------------------------

       Resolution: Won't Fix
    Fix Version/s: 5.10.0
         Assignee: Claus Ibsen

I added a note about the 4gb limit on windows

https://cwiki.apache.org/confluence/display/ACTIVEMQ/Java+Service+Wrapper

> 64-bit Java wrapper ignores wrapper.java.maxmemory values over 4096mb
> ---------------------------------------------------------------------
>
>                 Key: AMQ-4742
>                 URL: https://issues.apache.org/jira/browse/AMQ-4742
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.5.0
>         Environment: Red Hat Enterprise Linux Server release 5.7 (Tikanga)
> Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
> ActiveMQ 5.5.0
>            Reporter: Paul Lewis
>            Assignee: Claus Ibsen
>             Fix For: 5.10.0
>
>
> When increasing the maximum memory available to ActiveMQ via the wrapper.java.maxmemory
parameter in wrapper.conf, any values above 4096mb are ignored, and ActiveMQ defaults to 4096mb.
I have also tried passing in a custom 'wrapper.java.additional' parameter to set the -Xmx
parameter, but this also gets ignored.
> The issue is well documented at this blog: http://www.evanhoffman.com/evan/2013/08/13/java-wrapper-does-whatever-it-wants/
> This is a fairly major issue at it prevents ActiveMQ scaling to memory capacities above
4GB, which in turn limits the number of messages we can effectively store on a single queue.



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