No title

Hi,
I manage several databases PostgreSQL 7.3.1 and I have noticed a problem.
When I delete many rows (with OID) the free space of disk doesn't changed !
I make a vacuumdb, but I doesn't notice an increase of the free space disk.
In a last step, I make a backup and a restoration but, it's the same.

How can I remove the OID on my disk without corrupt my databases ?

I would like to upgrade in PostgreSQL 7.3.2, and I would like to know if this problem exist in this release ?

Best regards.

Annie.

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