[hibernate-dev] Memory consumption

Sanne Grinovero sanne at hibernate.org
Mon May 14 13:51:32 EDT 2012

On 14 May 2012 13:35, Steve Ebersole <steve at hibernate.org> wrote:
> Configuration is not kept around by Hibernate itself once the
> SessionFactory is built.  Nor is SimpleValue.  And as Hardy already
> mentioned, that code is undergoing major changes already for 5.0.

Hibernate Search needs to keep a reference to Configuration around. We
tried to avoid it as Emmanuel warned me that it would contain some
memory, but we couldn't avoid it; for sure we didn't expect it would
take much memory.. fact remains the Configuration is being hold on.
Maybe that should be rethought?

The culprit was the need of Search to be able to re-boot itself on
demand, in background - a weirdness required to accomodate needs of
Infinispan, mainly the fact that entities are not all known at boot
So an easy fix could be to keep this around only in the Infinispan use
case, drop it when registered as an extension of Hibernate ORM.

Andrej, what's the overall size you would save by dropping the
Configuration object?


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