> Tatsuo Ishii <t-ishii@sra.co.jp> writes:
> > I have written a small function that show how many tuples are dead
> > etc. in a specified table.
>
> Dead according to whose viewpoint? Under MVCC this seems to be
> in the eye of the beholder...
You can know if the tuple is visible to other backends, or at least take
a good guess like VACUUM does. Maybe he has coded that in there.
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