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Subject: Re: First draft of PG 19 release notes
From: Chao Li <li.evan.chao@gmail.com>
In-Reply-To: <agdXjNmH9h_aMskl@momjian.us>
Date: Tue, 26 May 2026 13:25:15 +0800
Cc: Peter Geoghegan <pg@bowt.ie>,
 PostgreSQL-development <pgsql-hackers@lists.postgresql.org>,
 chong.peng@enmotech.com
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References: <ad7ngXC125AvNqC2@momjian.us>
 <CAH2-Wzm1UAuv9ih6_ATbwbmrmusKPoJ2qSo3HBF-JaUEkVYUPg@mail.gmail.com>
 <agdXjNmH9h_aMskl@momjian.us>
To: Bruce Momjian <bruce@momjian.us>
Archived-At: 
 <https://www.postgresql.org/message-id/CC2712F9-8457-4733-AA9D-7D7C9843B590%40gmail.com>
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> On May 16, 2026, at 01:27, Bruce Momjian <bruce@momjian.us> wrote:
>=20
> On Fri, May 15, 2026 at 12:31:59PM -0400, Peter Geoghegan wrote:
>> On Tue, Apr 14, 2026 at 9:19=E2=80=AFPM Bruce Momjian =
<bruce@momjian.us> wrote:
>>> I have completed the first draft of the PG 19 release notes:
>>>=20
>>>        https://www.postgresql.org/docs/devel/release-19.html
>>=20
>> I do not think that this item merits mention in the release notes:
>>=20
>> "Add fake LSN support to hash index AM (Peter Geoghegan)"
>>=20
>> It offers no user-visible benefit. It's just preparation for index
>> prefetching, which didn't make it into Postgres 19.
>=20
> Ah, I see your point, and the commit message was clear:
>=20
>    This commit is similar to commit 8a879119, which taught nbtree to
>    use fake LSNs to improve its dropPin behavior.  However, unlike =
that
>    commit, this is not an independently useful enhancement, since hash
>    doesn't implement anything like nbtree's dropPin behavior (not =
yet).
>=20
> Item removed.
>=20
> --=20
>  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
>  EDB                                      https://enterprisedb.com
>=20
>  Do not let urgent matters crowd out time for investment in the =
future.
>=20
>=20

Chong Peng, whom I added to CC, reported this release note issue to me, =
so I=E2=80=99m just forwarding the message:

```
<listitem>
<para>
Add slot synchronization skip information to pg_stat_replication_slots =
(Shlok Kyal)
<ulink url=3D"&commit_baseurl;76b78721c">&sect;</ulink>
<ulink url=3D"&commit_baseurl;e68b6adad">&sect;</ulink>
<ulink url=3D"&commit_baseurl;5db6a344a">&sect;</ulink>
</para>

<para>
The new columns are slotsync_skip_count, slotsync_last_skip, and =
slotsync_skip_reason.
</para>
</listitem>
```

The feature description is inaccurate: slotsync_skip_count and =
slotsync_last_skip belong to pg_stat_replication_slots, while =
slotsync_skip_reason belongs to pg_replication_slots. Maybe it could be =
reworded as:
```
Add slot synchronization skip information to pg_stat_replication_slots =
and pg_replication_slots (Shlok Kyal)
```

Best regards,
--
Chao Li (Evan)
HighGo Software Co., Ltd.
https://www.highgo.com/