On 02 Feb 2005 00:58:17 -0500, Greg Stark <gsstark(at)mit(dot)edu> wrote:
>I don't recall what the original motivation to rewrite the analyze sampling
>was, did having lots of dead tuples cause bad estimates in 7.4?
The original intention was to make analysing huge tables faster. But
the patch turned out to be _slower_ for mid sized tables. So it was
sold to the community as a way to produce better statistics for
relations with many dead tuples near the start.
Servus
Manfred