Postgres 18 in production: async I/O tuning, uuidv7, and a safe upgrade in 2026
PostgreSQL 18 brings asynchronous I/O with up to 3x faster reads, time-ordered uuidv7, and RETURNING OLD/NEW. This 2026 guide covers io_method tuning, a uuidv4-to-uuidv7 migration, and the upgrade gotchas, from page
