| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: PG 13 release notes, first draft |
| Date: | 2020-05-12 00:22:46 |
| Message-ID: | 20200512002246.GJ4666@momjian.us |
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| Lists: | pgsql-hackers |
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(at)momjian(dot)us> https://momjian.us
EnterpriseDB https://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
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