On Thu, Mar 30, 2006 at 01:59:10PM +0200, Peter Eisentraut wrote: > EXPLAIN ANALYZE select activity_id from activity where state in (10000, > 10001) > order by activity_id limit 100; > > QUERY PLAN > > Limit (cost=0.00..622.72 rows=100 width=8) (actual > time=207356.054..207356.876 rows=100 loops=1) > -> Index Scan using activity_pk on activity (cost=0.00..40717259.91 > rows=6538650 width=8) (actual time=207356.050..207356.722 rows=100 loops=1) > Filter: ((state = 10000) OR (state = 10001)) > Total runtime: 207357.000 ms > > The table has seen VACUUM FULL and REINDEX before this.
The index scan is by activity_id, not by state. Do you have an index on state at all? /* Steinar */ -- Homepage: http://www.sesse.net/ ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
