Horton

Re: WAL Insertion Lock Improvements

Michael Paquier <michael@paquier.xyz>

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From: Michael Paquier <michael@paquier.xyz>
To: Andres Freund <andres@anarazel.de>
Cc: Nathan Bossart <nathandbossart@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Date: 2023-07-11T00:20:45Z
Lists: pgsql-hackers 
On Mon, Jun 05, 2023 at 08:00:00AM +0530, Bharath Rupireddy wrote:
> On Wed, May 31, 2023 at 5:05 PM Michael Paquier <michael@paquier.xyz> wrote:
>> @Andres: Were there any extra tests you wanted to be run for more
>> input?
> 
> @Andres Freund please let us know your thoughts.

Err, ping.  It seems like this thread is waiting on input from you,
Andres?
--
Michael

Commits

  1. Optimize pg_atomic_exchange_u32 and pg_atomic_exchange_u64.

  2. Document more assumptions of LWLock variable changes with WAL inserts

  3. Optimize WAL insertion lock acquisition and release with some atomics

  4. Avoid the use of a separate spinlock to protect a LWLock's wait queue.