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https://issues.apache.org/jira/browse/JAMES-1108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Norman Maurer resolved JAMES-1108.
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    Resolution: Fixed
      Assignee: Norman Maurer

Done.. we now use BlobMessages for storing our Mail instances.. Everything 
except the MimeMessage get stored as JMS Property. The MimeMessage will get 
stored via an custom BlobTransferPolicy, which streams directly to the 
filesystem. With the new implementation we need a way less memory as before. 
Even while bombing james with 500 concurrent smtp clients I saw a heap usage of 
70 - 90 mb only with the new implementation.

> Rewrite ActiveMQQueue to use BlobMessages and a custom BlobTransferPolicy
> -------------------------------------------------------------------------
>
>                 Key: JAMES-1108
>                 URL: https://issues.apache.org/jira/browse/JAMES-1108
>             Project: JAMES Server
>          Issue Type: Improvement
>    Affects Versions: 3.0-M1
>            Reporter: Norman Maurer
>            Assignee: Norman Maurer
>             Fix For: 3.0-M2
>
>
> When using ActiveMQ for the mail queue we can make use of BlobMessages which 
> allows us to stream the complete MimeMessage as Body.  So we don't need to 
> load it in memory 

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