Re: struggling with logical replication and WAL segments removed even with max_slot_wal_keep_size = -1

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