I'm building a large database for load testing, so I'm creating millions of
domain instances. I'm trying to use the standard bulk insert approach in
Hibernate, i.e. flush() and clear() the session periodically, with the whole
operation running in a transaction.
The problem is the instances are still around - I run out of memory after a
few hours with a heap set at 1G. I've turned off 2nd-level caching and looked
at the Session in a debugger and clear() definitely works - it's empty
afterwards. There are no mapped collections, and I'm not keeping any explicit
references to the instances.
But running in a profiler I can see the instance count steadily increase and
never decrease. Running gc() has no effect.
Any thoughts on what might be keeping a reference to these instances?
Burt
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