Re: Analyze results in more expensive query plan
Tom Lane <[email protected]>
| Newsgroups | gmane.comp.db.postgresql.performance |
|---|---|
| Message-ID | <[email protected]> |
Jeremy Altavilla <[email protected]> writes: > We have several select statements whose performance is greatly improved by > deleting some stats from pg_statistic. You might have better results by setting up some "extended stats" for the combination of bag_type columns that this query depends on. Per your description, there's a fair amount of cross-column correlation, which the planner will not expect without some extended stats to tell it so. https://www.postgresql.org/docs/10/planner-stats.html#PLANNER-STATS-EXTENDED regards, tom lane