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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: Mon, 9 Mar 2026 17:09:13 +0100
Message-ID: <CAD7nQBBuhmUo5L4SU=QGmknpN-JJ4mS8OZDM+Rt0qC_1t1ev3g@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]>
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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...
>
For my purpose, it doesn't actually seem that I would need
max_logical_wal_senders to limit WAL senders. Since each logical connection
always requires a logical replication slot, the actual number of active
logical connections (and logical WAL senders) would ultimately be bounded
by max_logical_replication_slots. My main concern is therefore slot
exhaustion rather than the WAL sender limit.
--
Ahmed Et-tanany
Aiven: https://aiven.io/
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To: [email protected]
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Subject: Re: [PATCH] Add max_logical_replication_slots GUC
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