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From: Christoph Berg <myon@debian.org>
To: John Naylor <johncnaylorls@gmail.com>
Cc: wenhui qiu <qiuwenhuifx@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: [PATCH] Document wal_compression=on
Date: Tue, 30 Jun 2026 11:57:20 +0200
Message-ID: <akOTAPyZK3r_DdfK@msg.df7cb.de> (raw)
In-Reply-To: <CANWCAZYzM6DKXJKQL5xAsbOEqmKthCN55+_M6gwBKE-4PFcxZg@mail.gmail.com>
References: <akJDHRtXwGLTppsQ@msg.df7cb.de>
	<CANWCAZYpQwgs61EF6NO_5L3V0cMZbwPBr15dE13V7Uu8cJ0DsQ@mail.gmail.com>
	<akM9so0EhM24ntiI@paquier.xyz>
	<CAGjGUAJr6txwgZ9jC90onH4Gj5OzHHpd0w=B-JYfs+J2kXvL3w@mail.gmail.com>
	<CANWCAZYzM6DKXJKQL5xAsbOEqmKthCN55+_M6gwBKE-4PFcxZg@mail.gmail.com>

Re: John Naylor
> FYI, default value of wal_compression is "off".

Still, there is value in being consistent. If default_toast_compression=lz4
and I turn wal_compression "on", I would also accept lz4 there.

We are picking the best toast compression algorithm by default, we
should also do that for wal.

Christoph





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