[ajug-members] JPA/Hibernate OutOfMemoryException

[John Camerin]

Use jvmstat to make sure you know where you are running out of memory.  The
cause may not be that the total heap size is not large enough

On 10/23/06, J. Talafous <jtalafous at gmail.com> wrote:
>
> I'm writing a thick client (pharmaceutical/scientific) using JPA with
> Hibernate as the provider and have been quite successful using this
> article as a guide:
>
>
> http://today.java.net/pub/a/today/2006/06/08/more-ejb3-persistence-api-for-client-side-developer.html
>
> Unfortunately, when I scale up, I am finding that Hibernate is running
> out of heap space when I EntityManager.persist() the entire object
> graph that I have built in my thick client, even with -Xmx1500m, etc.
> All works quite well in smaller object graphs.
>
> Since the whole reason I am using JPA is to avoid dealing with a
> database, I can bet that I am not using JPA/Hibernate efficiently.
> For example, I am cascading everything, and wonder if that is causing
> it.  Any links, ideas, etc. in getting better memory usage would be
> greatly appreciated.  Thanks in advance.
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