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Message-ID: <d488bb88-bb6b-4ae7-8dfc-3b03a3d4f6ef@quadratum-braccas.com>
Date: Sun, 4 Jan 2026 11:40:13 -0700
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Subject: Re: struggling with logical replication and WAL segments removed even
 with max_slot_wal_keep_size = -1
To: Laurenz Albe <laurenz.albe@cybertec.at>, pgsql-admin@lists.postgresql.org
References: <e0c88962-07a4-400b-84d6-b7d142a36ac1@quadratum-braccas.com>
 <82666d95c1c837ce600bc2a3f212f8ebbc1f5b22.camel@cybertec.at>
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From: Sbob <sbob@quadratum-braccas.com>
In-Reply-To: <82666d95c1c837ce600bc2a3f212f8ebbc1f5b22.camel@cybertec.at>
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On 1/4/26 9:29 AM, Laurenz Albe wrote:
> On Sat, 2026-01-03 at 11:28 -0700, Sbob wrote:
>> we have been fighting logical replication for some timetgres v14,
>> max_slot_wal_keep_size = -1 but I still get this kind of error on the
>> publisher every few days:
>>
>> ERROR:  requested WAL segment 00000002000009D6000000AB has already been removed
> What is the "wal_status" of the replication slot in "pg_replication_slots"?
>
> Unless you are hitting a bug (what is you minor version?), I'd say that some
> rogue software is removing files from "pg_wal".
>
> Compare the "restart_lsn" from "pg_replication_slots" with the available
> WAL segments on the primary.
>
> Yours,
> Laurenz Albe


We are running version 14.19

I will check the wal status next time this happens

Thanks