Group: pgsql.performance


Subject: query plan worse after analyze
From: tgl@sss.pgh.pa.us (Tom Lane)
Date: 10/6/2007 1:50:03 AM
"Jeff Frost" <jeff@frostconsultingllc.com> writes: > Before analyze it seems to choose Bitmap Heap Scan on episodes > current_episode, but after it chooses Index Scan Backward using > index_episodes_on_publish_on on episodes current_episode. Have you tried raising the stats target for "episodes"? Seems like the problem is a misestimate of the frequency of matches for season_id = something. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend