Hibernate version:
3.2


Code between sessionFactory.openSession() and session.close():
the bug happens during the configuration load

Name and version of the database you are using:
Oracle 10i


I've a large database with lot of tables. Hibernate instantiates all the proxy for the pojo's, using insane amount of memory.
at least 3g of heap are required for a clean start.

is ther a way to make it more memory efficient? speed is not a constraint.

Did you resolve this problem? what the solution? I'm experienced the same problem with oracle 10i and hibernate 3.2

The problem has not a simple solution

nobody on the hibernate team showed up telling anything about the hibernate problem.

because hibernate HAVE a problem in respect of memory usage, and just ignoring it won't move hibernate any further.

the "solution" for us was to build a jboss dev machine with a 64bit os, 64bit jvm and 4g of ram, all committed to jboss.

for 4k tables, 3.5g ram are used just for pojo decoration

we currently doesn't have enough resources to look at the problem, so we throw hardware at it.

I think that a weak reference map of the decorated classes with a lazy initialization pattern for the decoration will suffice, but we currently couldn't look into it.

ok. I'll try some things here. thank you for your fast answer.

those are the JAVA_OPTS currently in use

-Xms4g -Xmx4g -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -XX:MaxPermSize=512m -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -XX:CompileThreshold=30 -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing