Amazon Aurora now supports PostgreSQL major version 18

Summary

• Amazon Aurora PostgreSQL now supports PostgreSQL major version 18 (starting with Aurora version 18.3).
• Adds new pg_roaringbitmap extension, B‑tree skip scans, retains optimizer statistics on major upgrades, and enables parallel logical replication of large transactions for better performance and lower lag.
• Provides multiple upgrade paths (Blue/Green deployments, in‑place upgrade, snapshot restore) and is available across all commercial AWS and GovCloud regions.