What would cause JBoss to take up 4 more GB of memory than what is allocated?

Posted by Ichorus on Server Fault See other posts from Server Fault or by Ichorus
Published on 2010-04-09T20:22:25Z Indexed on 2010/04/09 20:33 UTC
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jboss

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memory-usage

Relevant part of the start up line: java -server -Xms10G -Xmx10G -XX:PermSize=1G -XX:MaxPermSize=1G

This instance ended up taking up 16GB of memory and 10GB of swap before killing the server.

Any ideas on what could cause that?

This is the only major application running on a RedHat system with 16GB RAM and 10GB swap.

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