public inbox for [email protected]
help / color / mirror / Atom feedFrom: Ahmed Et-tanany <[email protected]>
To: Fujii Masao <[email protected]>
Cc: Álvaro Herrera <[email protected]>
Cc: [email protected]
Subject: Re: [PATCH] Add max_logical_replication_slots GUC
Date: Thu, 29 Jan 2026 14:01:22 +0100
Message-ID: <CAD7nQBCwWj=v0QE6HL3BDOPrbqE1raniZ6DRPi_cyLxv81+HJQ@mail.gmail.com> (raw)
In-Reply-To: <CAHGQGwEaBw9dd+Nzb2ETDJ-40nJTo6GRXrG_FcP0rmw3_-qU_Q@mail.gmail.com>
References: <CAD7nQBD1iy3NAS2YRDUH+zk0g=50px_h_wRsLcFkai7R_RF6VQ@mail.gmail.com>
<[email protected]>
<CAD7nQBCfgCeTwO=45OXhGc=wpYBrWXJfzJKRy+T26_jALxatLg@mail.gmail.com>
<CAHGQGwEaBw9dd+Nzb2ETDJ-40nJTo6GRXrG_FcP0rmw3_-qU_Q@mail.gmail.com>
On Thu, Jan 29, 2026 at 12:39 PM Fujii Masao <[email protected]> wrote:
>
> Would something like max_logical_wal_senders also be needed for your
> purpose?
> Otherwise, logical replication connections could exhaust max_wal_senders
> and
> prevent physical replication connections from being established.
>
> That said, adding two separate GUC parameters (i.e.,
> max_logical_replication_slots
> and max_logical_wal_senders) for this purpose doesn't seem like a
> great solution,
> though...
>
>
That's a great point! I'm thinking we could potentially avoid
introducing a separate max_logical_wal_senders GUC by reusing
max_logical_replication_slots to decide whether a WAL sender can
start for logical replication.
This way, the limit on logical slots would also indirectly cap
the number of logical WAL senders, helping protect physical
replication connections without adding another configuration
parameter.
What do you think about this approach?
Best regards,
--
Ahmed Et-tanany
Aiven: https://aiven.io/
view thread (10+ messages) latest in thread
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected]
Subject: Re: [PATCH] Add max_logical_replication_slots GUC
In-Reply-To: <CAD7nQBCwWj=v0QE6HL3BDOPrbqE1raniZ6DRPi_cyLxv81+HJQ@mail.gmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox