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From: Michael Paquier <[email protected]>
To: David Steele <[email protected]>
Cc: Andrey M. Borodin <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Stefan Fercot <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Tomas Vondra <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: post-freeze damage control
Date: Wed, 10 Apr 2024 08:50:56 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>

On Wed, Apr 10, 2024 at 09:29:38AM +1000, David Steele wrote:
> Even so, only keeping WAL for the last backup is a dangerous move in any
> case. Lots of things can happen to a backup (other than bugs in the
> software) so keeping WAL back to the last full (or for all backups) is
> always an excellent idea.

Yeah, that's an excellent practive, but is why I'm less worried for
this feature.  The docs at [1] caution about "not to remove earlier
backups if they might be needed when restoring later incremental
backups".  Like Alvaro said, should we insist a bit more about the WAL
retention part in this section of the docs, down to the last full
backup?

[1]: https://www.postgresql.org/docs/devel/continuous-archiving.html#BACKUP-INCREMENTAL-BACKUP
--
Michael


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