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From: Ahmed Et-tanany <[email protected]>
To: Álvaro Herrera <[email protected]>
Cc: [email protected]
Subject: Re: [PATCH] Add max_logical_replication_slots GUC
Date: Wed, 28 Jan 2026 14:02:01 +0100
Message-ID: <CAD7nQBCfgCeTwO=45OXhGc=wpYBrWXJfzJKRy+T26_jALxatLg@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CAD7nQBD1iy3NAS2YRDUH+zk0g=50px_h_wRsLcFkai7R_RF6VQ@mail.gmail.com>
	<[email protected]>

Yes, that's what I meant.

On Wed, Jan 28, 2026 at 1:55 PM Álvaro Herrera <[email protected]> wrote:

> On 2026-Jan-28, Ahmed Et-tanany wrote:
>
> > In practice, a burst of logical replication activity can exhaust all
> > available replication slots, which in turn prevents physical standbys
> > from connecting or restarting.
> >
> > This is problematic because logical replication slots are often
> > user-managed and can grow dynamically,
>
> Ah, you mean that users doing CREATE SUBSCRIPTION could cause the limit
> to be reached, possibly blocking streaming replication.  Yeah, it makes
> sense to have a separate limit.
>
> --
> Álvaro Herrera         PostgreSQL Developer  —
> https://www.EnterpriseDB.com/
> "[PostgreSQL] is a great group; in my opinion it is THE best open source
> development communities in existence anywhere."                (Lamar Owen)
>


-- 
Ahmed Et-tanany
Aiven: https://aiven.io/

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