From the Release Notes:<p>Major enhancements in PostgreSQL 9.6 include:<p>Parallel sequential scans, joins and aggregates<p>Elimination of repetitive scanning of old data by autovacuum<p>Synchronous replication now allows multiple standby servers for increased reliability<p>Full-text search for phrases<p>Support for remote joins, sorts, and updates in postgres_fdw<p>Substantial performance improvements, especially in the area of improving scalability on many-CPU servers