Horton

Re: Direct I/O

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Mikael Kjellström <mikael.kjellstrom@gmail.com>, Andres Freund <andres@anarazel.de>, Andrew Dunstan <andrew@dunslane.net>, Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>, Christoph Berg <myon@debian.org>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2023-04-15T03:22:37Z
Lists: pgsql-hackers 
Thomas Munro <thomas.munro@gmail.com> writes:
> On Sat, Apr 15, 2023 at 7:50 AM Mikael Kjellström
> <mikael.kjellstrom@gmail.com> wrote:
>> want me to switch to clang instead?

> I vote +1, that's the system compiler in modern OpenBSD.

Ditto, we need coverage of that.

> As for curculio, I don't understand the motivation for maintaining
> that machine.  I'd rather know if OpenBSD 7.3 works.

Those aren't necessarily mutually exclusive :-).  But I do agree
that recent OpenBSD is more important to cover than ancient OpenBSD.

			regards, tom lane

Commits

  1. Rename hook functions for debug_io_direct to match variable name.

  2. Rename io_direct to debug_io_direct.

  3. Skip the 004_io_direct.pl test if a pre-flight check fails.

  4. Use higher wal_level for 004_io_direct.pl.

  5. Skip \password TAP test on old IPC::Run versions

  6. Add io_direct setting (developer-only).

  7. Introduce PG_IO_ALIGN_SIZE and align all I/O buffers.

  8. Add palloc_aligned() to allow aligned memory allocations

  9. initdb: When running CREATE DATABASE, use STRATEGY = WAL_COPY.