2010/1/5 Milan Zamazal <pdm@xxxxxxxxxxxx>: >>>>>> "PS" == Pavel Stehule <pavel.stehule@xxxxxxxxx> writes: > > PS> Have you original values random_page_cost and seq_page_cost in > PS> postgres.conf? > > Yes. To be sure I uncommented the values in postgresql.conf > > seq_page_cost = 1.0 # measured on an arbitrary scale > random_page_cost = 4.0 # same scale as above and value efective_cache_size ??? what is CREATE INDEX stament for index? Pavel > > and restarted PostgreSQL. The result looks basically the same: > > explain analyze declare c cursor for select * from foo2 order by value; > QUERY PLAN > ------------------------------------------------------------------------------------------------------------------------- > Sort (cost=1829429.20..1854429.20 rows=9999999 width=10) (actual time=43709.313..49265.244 rows=9999999 loops=1) > Sort Key: value > Sort Method: external merge Disk: 204208kB > -> Seq Scan on foo2 (cost=0.00..154049.99 rows=9999999 width=10) (actual time=0.072..1760.585 rows=9999999 loops=1) > Total runtime: 54399.967 ms > (5 rows) > > -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
