Horton

Re: Direct I/O

Mikael Kjellström <mikael.kjellstrom@mksoft.nu>

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From: Mikael Kjellström <mikael.kjellstrom@mksoft.nu>
To: Andrew Dunstan <andrew@dunslane.net>, Tom Lane <tgl@sss.pgh.pa.us>
Cc: Thomas Munro <thomas.munro@gmail.com>, Andres Freund <andres@anarazel.de>, Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>, Christoph Berg <myon@debian.org>, mikael.kjellstrom@gmail.com, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2023-04-16T18:05:02Z
Lists: pgsql-hackers 

On 2023-04-16 19:59, Andrew Dunstan wrote:

>> On Apr 16, 2023, at 12:16 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>
>> Andrew Dunstan <andrew@dunslane.net> writes:
>>>> On 2023-04-16 Su 10:18, Tom Lane wrote:
>>>> Actually, as long as it's still OpenBSD I think you can keep using
>>>> the same animal name ... Andrew, what's the policy on that?
>>
>>> update_personality.pl lets you update the OS version / compiler version
>>> / owner-name / owner-email
>>
>> Oh wait ... this involves a switch from gcc in OpenBSD 5.9 to clang
>> in OpenBSD 7.3, doesn't it?  That isn't something update_personality
>> will handle; you need a new animal if the compiler product is changing.
>>
>>   
> 
> Correct.

OK. I registered a new animal for this then.

So if someone could look at that and give be an animal name + secret I 
can set this up.

/Mikael

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.