Dirty checking Performance issue

[graffer <ra...@gmx.at>]

Hi guys,

Are there any limitations concerning the persistence cache in OpenJPA? I'm
having an application that loads several thousand entities and then adds
some using em.persist(newEntity);

The problem is that persists takes extremly long (up to serveral seconds per
entity on a server machine)! 
The profiler shows me that the persist method stays very long in the dirty
checking:

90,8% - 1.266 s - 31 inv. org.apache.openjpa.kernel.ManagedCache.dirtyCheck

Here is a jProfiler screenshot:

http://n2.nabble.com/file/n220364/persist.gif 

Flushing or evicting entities from the session is not possible in this
application.
Can anyone help with this issue?

bye, Georg
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