[jboss-user] JBoss Resident memory eats all the swap space

Remo Liechti remo.liechti at swisslog.com
Fri Mar 15 04:13:22 EDT 2013

Hi guys,

Java process of jboss 5.1.0 eats like 500mb of RESident memory (top command) per day, which in the end fills all the swap space of the redhat linux and makes the entire system unstable.

JBoss is configuration:
JAVA_OPTS="-Xms128m -Xmx1024m -XX:PermSize=128M -XX:MaxPermSize=384M -Dorg.apache.el.parser.COERCE_TO_ZERO=false -Djava.awt.headless=true -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

None of the memory visualized with jconsole(heap memory usage, non-heap memory usage, ps eden, ps survivor, ps old gen, ps code cache, ps perm gen) is growing over time, I took multiple heap dumps over time and compared. There is no heap memory leak within the application. Also, threads are not increasing.
Never the less, the RESident memory grows and grows, so after a week usually there is no swap left anymore and jboss has to be restarted. RESident starts at 1.4gb after new start of jboss (I guess this is xmx+perm) and increases up to 6gb before swap is used up.

The only thing I saw growing within jconsole is the "total loaded classes" which never ever gets smaller. However, the "loaded classes" stays on a constant level.
The application uses Spring, hibernate and JSF.

Do you have any ideas that can point me in the right direction?


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