Hi Laurenz, Thanks for answering! I find it very strange, because the publication is needed to make a subscription, which makes the slot. Thanks for looking into it and helping me understand.
Cheers! Willy-Bas Loos On Mon, Apr 7, 2025 at 3:31 PM Laurenz Albe <laurenz.a...@cybertec.at> wrote: > On Mon, 2025-04-07 at 12:16 +0200, Willy-Bas Loos wrote: > > My question is not so much about "can i drop a certain replication > slot", > > more about "does this publication still have any replication slots?". > > Or, if you will: "what's the publication for this replication slot?". > > > > I've double checked the views that you suggested, and I found that I can > relate > > the WAL sender processes to replication slots through > pg_replication_slots.active_pid . > > I've also looked into replication origins. > > > > But I can't find a link to the publication. And that's what I need to > know. > > I don't think that there is a connection between a publication and a > replication slot. That connection is only made when a subscriber connects > and runs the START_REPLICATION command [1] and specifies the "pgoutput" > plugin with the "publication_names" option [2]. > > I don't think you can see that information reflected in a system view > on the primary. You'd have to query "pg_subscription" on the standby. > > Yours, > Laurenz Albe > > > [1]: > https://www.postgresql.org/docs/current/protocol-replication.html#PROTOCOL-REPLICATION-START-REPLICATION-SLOT-LOGICAL > [2]: > https://www.postgresql.org/docs/current/protocol-logical-replication.html#PROTOCOL-LOGICAL-REPLICATION-PARAMS > -- Willy-Bas Loos
