Postgres offers a variety of session-based tunings for their genetic query optimizer. See items such as geqo_effort. Note that postgres caches query plans, so t

Postgres offers a variety of session-based tunings for their genetic query optimizer. See items such as geqo_effort. Note that postgres caches query plans, so the query planning cost for a well-constructed query will only be paid once(ish). http://www.postgresql.org/docs/9.2/static/runtime-config-query.html http://www.postgresql.org/docs/9.2/static/runtime-config-que...