Peter Geoghegan <p...@heroku.com> writes: > On Mon, Apr 21, 2014 at 5:50 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> ARC *was* the predecessor algorithm. See commit 5d5087363.
> I believe that the main impetus for replacing ARC with clock sweep > came from patent issues, though. That was one issue, but performance gains were a large part of it too, and the main reason why we picked clock sweep rather than something else. Did you read the commit message I pointed to? (See also 4e8af8d27.) regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers