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Re: OutOfMemory hibernate scroll with 2M records | Postgresql 8.4 DB - Mailing list pgsql-jdbc

From Thomas Kellerer
Subject Re: OutOfMemory hibernate scroll with 2M records | Postgresql 8.4 DB
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Msg-id hgpts7$u9m$1@ger.gmane.org
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In response to OutOfMemory hibernate scroll with 2M records | Postgresql 8.4 DB  (Ankit Kumar <ankitk@xebia.com>)
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Ankit Kumar wrote on 22.12.2009 05:15:
> It appears the driver class is loading all entity objects in memory and
> not releasing them as expected in a scroll operation.

That's documented:

http://jdbc.postgresql.org/documentation/84/query.html#query-with-cursor

Just enable "query based retrieval" and the driver does not load everything into memory.

Thomas

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