Hi, Kjeld, Kjeld Peters wrote: > Select and update statements are quite slow on a large table with more > than 600,000 rows. The table consists of 11 columns (nothing special). > The column "id" (int8) is primary key and has a btree index on it. > > The following select statement takes nearly 500ms: > > SELECT * FROM table WHERE id = 600000; Known issue which is fixed in 8.X servers, postgreSQL sees your 600000 as int4 literal and does not grasp that the int8 index works for it. SELECT * FROM table WHERE id = 600000::int8; should do it. > SELECT version(); > "PostgreSQL 7.4.2 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.3.3 > (SuSE Linux)" Btw, you should update to 7.4.12, there are importand bug fixes and it is upgradable "in place", without dumping and reloading the database. HTH, Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org
