Re: ANALYZE sampling is too good - Mailing list pgsql-hackers

From Greg Stark
Subject Re: ANALYZE sampling is too good
Date
Msg-id CAM-w4HOTrwt-v-zOxp747rf+PW3r9EYAyGtKCtDvrFQ1AScSuw@mail.gmail.com
Whole thread Raw
In response to Re: ANALYZE sampling is too good  (Simon Riggs <simon@2ndQuadrant.com>)
Responses Re: ANALYZE sampling is too good
Re: ANALYZE sampling is too good
List pgsql-hackers
On Wed, Dec 11, 2013 at 12:40 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
> When we select a block we should read all rows on that block, to help
> identify the extent of clustering within the data.

So how do you interpret the results of the sample read that way that
doesn't introduce bias?

-- 
greg



pgsql-hackers by date:

Previous
From: Simon Riggs
Date:
Subject: Re: ANALYZE sampling is too good
Next
From: Peter Geoghegan
Date:
Subject: Re: ANALYZE sampling is too good