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From: Álvaro Herrera <[email protected]>
To: Ahmed Et-tanany <[email protected]>
Cc: [email protected]
Subject: Re: [PATCH] Add max_logical_replication_slots GUC
Date: Wed, 28 Jan 2026 13:54:32 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAD7nQBD1iy3NAS2YRDUH+zk0g=50px_h_wRsLcFkai7R_RF6VQ@mail.gmail.com>

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)

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