Re: Wal file increase

From: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
To: kasem adel <kasemadel8(at)gmail(dot)com>, pgsql-admin <pgsql-admin(at)postgresql(dot)org>
Subject: Re: Wal file increase
Date: 2025-12-15 08:09:00
Message-ID: d58f28bf89b8606a9b15e9a957a1a26f00e7c2e7.camel@cybertec.at
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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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