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From: Michael Paquier <[email protected]>
To: Nathan Bossart <[email protected]>
Cc: Noah Misch <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Robert Pang <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: [email protected]
Cc: [email protected]
Subject: Re: Back-patch of: avoid multiple hard links to same WAL file after a crash
Date: Mon, 10 Mar 2025 15:21:04 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <20220502230613.GA3398932@nathanxps13>
	<YnOwioN/[email protected]>
	<YsORtfT4+fXj/[email protected]>
	<CAJhEC04tBkYPF4q2uS_rCytauvNEVqdBAzasBEokfceFhF=KDQ@mail.gmail.com>
	<Z2L6e1w-xABVTBRR@nathan>
	<7chjz7zeigbsbt7nim4cj6zryflzcpy2lgenas3yh7cpvwf3gb@m6cwqzlvfd6q>
	<[email protected]>
	<[email protected]>
	<Z8n7HopB0bb4_j19@nathan>
	<[email protected]>

On Mon, Mar 10, 2025 at 02:25:28PM +0900, Michael Paquier wrote:
> I am attaching a full set of patches for v14 and v13 that can be used
> for these tests.  WDYT?

And I forgot to mention that I've checked both v14 and v13, where I
have noticed the two patterns "invalid magic number 0000 in log
segment X, offset 0" and "unexpected pageaddr X in log segment Y" as
LOG and DEBUG entries.  

These are gone once the patches are applied on both branches.  Just
set max_wal_size and min_wal_size (128MB here) low enough with a
standby doing archive recovery, and bulk-load WAL on the primary to
accelerate the reproduction of the problem.  It takes a couple of
minutes to have these show up with the unpatched branches.
--
Michael


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