> Tatsuo Ishii <[EMAIL PROTECTED]> 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.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  [EMAIL PROTECTED]               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
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