Thread

Re: Adding REPACK [concurrently]

Alvaro Herrera <alvherre@alvh.no-ip.org> — 2026-05-19T18:52:13Z

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/