Episode

Postgres 18 gets Async IO

Podcast: The Backend Engineering Show with Hussein Nasser
Published: Oct 3, 2025
Duration seconds: 2472
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Canonical source: https://podcasters.spotify.com/pod/show/hnasr/episodes/Postgres-18-gets-Async-IO-e38st84
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Summary

Postgres 18 has been released with many exciting features such as UUIDv7, Over explain module, composite index skip scans, and the most anticipated asynchronous IO with worker and io_uring mode which I uncover in this show. Hope you enjoy it 0:00 Intro 1:30 Synchronous vs Asynchronous calls 3:00 Synchronous IO 6:30 Asynchronous IO 10:00 Postgres 17 synchronous io 17:20 The challenge of Async IO in Postgres 18 20:00 io_method worker23:00 io_method io_uring 29:30 io_method sync 31:08 Async IO isn’t done! 3 1:30 Support for backend writers 32:36 Improve worker io_method 33:00 direct io support 37:00 Summary