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From: Alvaro Herrera <[email protected]>
To: Amit Kapila <[email protected]>
Cc: Antonin Houska <[email protected]>
Cc: Mihail Nikalayeu <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Srinath Reddy Sadipiralla <[email protected]>
Cc: Matthias van de Meent <[email protected]>
Cc: Pg Hackers <[email protected]>
Cc: Robert Treat <[email protected]>
Subject: Re: Adding REPACK [concurrently]
Date: Tue, 19 May 2026 20:52:13 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAA4eK1+nJUc147td7NgVuW=gjV9+Rd04+kkLssQL5MR1oUMnJA@mail.gmail.com>

On 2026-May-14, Amit Kapila wrote:

> The broader issue is that the entire logical decoding mechanism is
> designed to process cluster-wide transactions. This patch tries to
> bypass that foundational assumption, but only during the initial
> snapshot construction while processing running_xacts record.
> 
> To be clear, I am not against the idea of db-specific snapshots to
> enable concurrent repacks. My concern is simply the time required to
> get the architecture right. In its current state, we need more time to
> carefully consider how this db-specific concept interacts with the
> rest of the logical decoding machinery, which is built for
> cluster-wide records.

Hmm.  So at this point I have to admit that the time I'll have before
beta 1 is going to be very scarce.  You're probably right that it's
better to revert db-specific snapshots in pg19, and try again for 20.
The revert should be a simple patch.

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/

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