David,My first thought would be to increase statistics dramatically on the filtered columns in hopes of making PG realize there's a lot of rows there; it's off by 8x. Correlations stats are an ongoing issue in PostgreSQL.
-- Josh Berkus PostgreSQL Experts Inc. www.pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
