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From "Paul Lewis (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-4742) 64-bit Java wrapper ignores wrapper.java.maxmemory values over 4096mb
Date Thu, 26 Sep 2013 15:20:03 GMT
Paul Lewis created AMQ-4742:
-------------------------------

             Summary: 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
    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


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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