Tatsuo Ishii <[EMAIL PROTECTED]> writes:
> Probably VACUUM works well for small to medium size tables, but not
> for huge ones. I'm considering about to implement "on the spot
> salvaging dead tuples".

That's impossible on its face, except for the special case where the
same transaction inserts and deletes a tuple.  In all other cases, the
transaction deleting a tuple cannot know whether it will commit.

                        regards, tom lane

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