> BTW The reason I'm asking about this is we're trying to come up with a good 
> scheme for phppgadmin to show estimated counts without showing incorrect 
> numbers to users... or at least giving them a clue that the numbers might be 
> really off. 

The vacuum daemon should know how far off the count might be. You can
display 100 +- 15%, where the 100 is collected by ANALYZE and the 15% is
determined based on the vacuum daemon estimation.

Of course, AVD needs to be implemented and the interface created (a
pg_count view?)...


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