On 10 December 2013 19:54, Josh Berkus <j...@agliodbs.com> wrote: > On 12/10/2013 11:49 AM, Peter Geoghegan wrote: >> On Tue, Dec 10, 2013 at 11:23 AM, Simon Riggs <si...@2ndquadrant.com> wrote: >> I don't think that anyone believes that not doing block sampling is >> tenable, fwiw. Clearly some type of block sampling would be preferable >> for most or all purposes. > > As discussed, we need math though. Does anyone have an ACM subscription > and time to do a search? Someone must. We can buy one with community > funds, but no reason to do so if we don't have to.
We already have that, just use Vitter's algorithm at the block level rather than the row level. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
