On Sun, Jan 8, 2012 at 9:25 AM, Simon Riggs <si...@2ndquadrant.com> wrote: > I've taken that idea and used it to build a second Clog cache, known > as ClogHistory which allows access to the read-only tail of pages in > the clog. Once a page has been written to for the last time, it will > be accessed via the ClogHistory Slru in preference to the normal Clog > Slru. This separates historical accesses by readers from current write > access by committers. Historical access doesn't force dirty writes, > nor are commits made to wait when historical access occurs.
This seems to need a rebase. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
