Schedule - FOSDEM PGDay 2020

Asynchronous IO for PostgreSQL

Date: 2020-01-31
Time: 11:30–12:20
Room: PGDay at Hilton
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For many workloads PostgresSQL currently cannot take full advantage of modern storage systems, like e.g. good SSD. One of the major reasons for that is that the majority of storage IO postgres performs is done synchronously (see e.g. slide 8fff in for an illustration as to why that is a problem).

This talk will discuss the outcome of a prototype to add asynchronous IO support to PostgreSQL. The talk will discuss: - How would async IO support for PG look like architecturally? - Initial performance numbers - What sub-problems exist that can be integrated separately - Currently that prototype uses linux' new io_uring asynchronous IO support - which other OSs can be supported?

Note that support for asynchronous IO is not directly the same as support for direct IO. This talk will mainly focus on asynchronicity, and direct IO only secondarily.


The following slides have been made available for this session:


Andres Freund