On Sun, Jan 8, 2012 at 9:25 AM, Simon Riggs <simon@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
