Postgres 18 gets Async IO

The Backend Engineering Show with Hussein Nasser

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