On Mon, Dec 10, 2012 at 10:56 AM, Xin Pan <panxin0...@gmail.com> wrote: > However, I still witness large amount of page writes. > Can anyone tell where are the page writes come from?
Probably not without more details. Things like VACUUM, COPY, and sequential scans use ring-buffers that are smaller than shared_buffers, so you often see the cache fill up with your data only slowly just after starting the database, but if the database really fits in shared_buffers, you should eventually settle into a rhythm where dirty buffers are written to disk only once per checkpoint cycle. You might want to monitor pg_stat_bgwriter. -- 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
