Re: Large files for relations

On Sat, May 13, 2023 at 11:01 AM Thomas Munro <thomas.munro@gmail.com> wrote:
> On Sat, May 13, 2023 at 4:41 AM MARK CALLAGHAN <mdcallag@gmail.com> wrote:
> > use XFS and O_DIRECT

As for direct I/O, we're only just getting started on that.  We
currently can't produce more than one concurrent WAL write, and then
for relation data, we just got very basic direct I/O support but we
haven't yet got the asynchronous machinery to drive it properly (work
in progress, more soon).  I was just now trying to find out what the
state of parallel direct writes is in ext4, and it looks like it's
finally happening:

https://www.phoronix.com/news/Linux-6.3-EXT4