Re: Optimize SnapBuildPurgeOlderTxn to purge committed xids in-place

From: Neil Chen <carpenter(dot)nail(dot)cz(at)gmail(dot)com>
To: Xuneng Zhou <xunengzhou(at)gmail(dot)com>
Cc: Postgres hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Optimize SnapBuildPurgeOlderTxn to purge committed xids in-place
Date: 2026-01-08 06:18:44
Message-ID: CAA3qoJmF1OEWbOrsy08HjF27YbQPqPSzpBrPDnjShPMgDAm1ag@mail.gmail.com
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Hi Xuneng,

On Thu, Jan 8, 2026 at 12:49 PM Xuneng Zhou <xunengzhou(at)gmail(dot)com> wrote:

>
> Thanks for working on this. I noticed the same issue and proposed a
> similar patch before. Here's Michael's feedback on it [1].
>
> [1] https://www.postgresql.org/message-id/aPbGOWbMrHXgnY6j@paquier.xyz
> [2]
> https://www.postgresql.org/message-id/flat/CABPTF7V9gcpTLrOY0fG4YontoHjVg8YrbmiH4XB_5PT6K56xhg%40mail.gmail.com
> [3]
> https://www.postgresql.org/message-id/flat/CABPTF7XiwbA38OZBj5Y2F-q%2BfZ%3D03YFN9iFnb_406F4SfE-f4w%40mail.gmail.com
>
>
Thanks for pointing this out. I will read through the references you
provided in detail.
Let’s continue the discussion in your thread.

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