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From "Paul Lewis (JIRA)" <>
Subject [jira] [Updated] (AMQ-4742) 64-bit Java wrapper ignores values over 4096mb
Date Fri, 27 Sep 2013 08:59:02 GMT


Paul Lewis updated AMQ-4742:

    Component/s: Broker
> 64-bit Java wrapper ignores values over 4096mb
> ---------------------------------------------------------------------
>                 Key: AMQ-4742
>                 URL:
>             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
> When increasing the maximum memory available to ActiveMQ via the
parameter in wrapper.conf, any values above 4096mb are ignored, and ActiveMQ defaults to 4096mb.
I have also tried passing in a custom '' parameter to set the -Xmx
parameter, but this also gets ignored.
> The issue is well documented at this blog:
> 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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