Horton

Re: remove more archiving overhead

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: pgsql-hackers@postgresql.org
Date: 2022-02-22T19:52:29Z
Lists: pgsql-hackers

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On Tue, Feb 22, 2022 at 09:37:11AM -0800, Nathan Bossart wrote:
> In my testing, I found that when I killed the server just before unlink()
> during WAL recyling, I ended up with links to the same file in pg_wal after
> restarting.  My latest test produced links to the same file for the current
> WAL file and the next one.  Maybe WAL recyling should use durable_rename()
> instead of durable_rename_excl().

Here is an updated patch.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com

Commits

  1. Be more prescriptive in new doc about re-archiving of same WAL file.

  2. doc: Add note about re-archiving of same WAL files in docs.

  3. Reduce overhead of renaming archive status files.