Hi,
On 2025-05-06 16:53:46 -0400, Bruce Momjian wrote:
> On Tue, May 6, 2025 at 11:55:53AM -0400, Andres Freund wrote:
> > On 2025-05-05 15:07:01 -0400, Jonathan S. Katz wrote:
> > > ### Performance
> > >
> > > PostgreSQL 18 introduces an asynchronous I/O (AIO) subsystem using
> > > `io_uring` on Linux, which, when combined with direct I/O (DIO), lets
> > > PostgreSQL directly interface with storage interfaces. This new subsystem
> > > gives PostgreSQL the opportunity to maximize its usage of hardware transfer
> > > capacity, and this initial release supporting file system reads such as
> > > sequential scans, bitmap heap scans, and vacuums, with tests showing up to a
> > > 2-3x performance improvements.
> >
> > This isn't quite right:
> >
> > - AIO is usable on all platforms, it *optionally* can use io_uring on linux -
> > the default is to use AIO using worker processes
>
> Actually, is AIO using worker processes new behavior or just a new
> implementation of our old behavior? I might need to point that out in
> the release notes.
New.
- Andres
