Try a pg_hint_plan Rows hint to explore what would happen to the plan if you fixed the bad join cardinality estimate: /*+ rows(prm prc #2028) */ alternatively you could specify a HashJoin hint, but I think it's better to fix the cardinality estimate and then let the optimizer decide what the best plan is. I agree with Justin that it looks like the version and recommended_content_id columns are correlated and that's the likely root cause of the problem, but you don't need to upgrade to fix this one query. ----- Jim Finnerty, AWS, Amazon Aurora PostgreSQL -- Sent from: http://www.postgresql-archive.org/PostgreSQL-performance-f2050081.html