From: Bruce Momjian <bruce@momjian.us>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: PG 13 release notes, first draft
Date: Mon, 11 May 2020 20:22:46 -0400
Message-ID: <20200512002246.GJ4666@momjian.us> (raw)
In-Reply-To: <CAA4eK1+DDmycMNy9VQH8dFcPnkF5j8MNWVHL4yWNZ_0BL8HF2Q@mail.gmail.com>
References: <20200505031600.GB21752@momjian.us>
<CAA4eK1+tOd6vTXBjUyjEQF+NALdoX8d-EZu5HEs_nxZ-huX2Hw@mail.gmail.com>
<CAA4eK1+DDmycMNy9VQH8dFcPnkF5j8MNWVHL4yWNZ_0BL8HF2Q@mail.gmail.com>
On Mon, May 11, 2020 at 10:52:41AM +0530, Amit Kapila wrote:
> One more observation:
>
> Allow inserts to trigger autovacuum activity (Laurenz Albe, Darafei
> Praliaskouski)
> This new behavior allows pages to be set as all-visible, which then
> allows index-only scans, ...
>
> The above sentence sounds to mean that this feature allows index-only
> scans in more number of cases after this feature. Is that what you
> intend to say? If so, is that correct? Because I think this will
Yes.
> allow index-only scans to skip "Heap Fetches" in more cases.
Uh, by definition an index-only scan only scans the index, not the heap,
right? It is true there are fewer heap fetches, but fewer heap features
I thought mean more index-only scans.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EnterpriseDB https://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
+ Ancient Roman grave inscription +
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To: pgsql-hackers@postgresql.org
Cc: bruce@momjian.us, amit.kapila16@gmail.com
Subject: Re: PG 13 release notes, first draft
In-Reply-To: <20200512002246.GJ4666@momjian.us>
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