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From: Laurenz Albe <[email protected]>
To: kasem adel <[email protected]>
To: pgsql-admin <[email protected]>
Subject: Re: Wal file increase
Date: Mon, 15 Dec 2025 09:09:00 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <AM4P193MB2941220558624561A6A5F6EBAEADA@AM4P193MB2941.EURP193.PROD.OUTLOOK.COM>
References: <CAP-pBm9kY6HafeGD-1vrL8UqaQLu2jFJthBjyOsypY=iGJRBxA@mail.gmail.com>
	<[email protected]>
	<AM4P193MB2941220558624561A6A5F6EBAEADA@AM4P193MB2941.EURP193.PROD.OUTLOOK.COM>

On Mon, 2025-12-15 at 07:25 +0000, kasem adel wrote:
> Thanks for your support We have physical replication connection with Postgres node standby
> and have another replication slot with logical replication with another node and every day
> after run pg_basebackup we face huge number of file created and size per every hour is 23GB
> and in normal size is 0.8 GB and in logical replication we see in logs it’s in same
> checkpoint but baseline change and we run pg_basebackup with -X fetch -C fast.

pg_basebackup does not increase the WAL volume, except by the full-page images that get
written after any checkpoint.  So you'd need to find an explanation for that.

"-X fetch" is not a good choice.  Use "-X stream".

Anyway, you didn't answer all my questions.

Yours,
Laurenz Albe

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