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Hussein Nasser: Asynchronous IO in Postgres 18 | The Backend Engineering Show

Postgres 18 just dropped with a host of goodies—think UUIDv7, an Over-explain module, composite index skip scans and, best of all, the brand-new async IO support. Hussein kicks off with a quick refresher on sync vs async calls, revisits how Postgres 17 handled IO, then dives deep into the new io_method worker and io_uring modes, complete with benchmarks and real-world tips.

Along the way you’ll catch future-proof features in the works—direct IO support, better backend writer handling and more—plus a neat recap at the end. Perfect if you want a straight-to-the-point tour of Postgres’s IO evolution. Enjoy!

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