public inbox for [email protected]  

help / color / mirror / Atom feed

From: Bruce Momjian <[email protected]>
To: Amit Langote <[email protected]>
Cc: David Rowley <[email protected]>
Cc: Jonathan S. Katz <[email protected]>
Cc: [email protected]
Subject: Re: PostgreSQL 12: Feature Highlights
Date: Thu, 16 May 2019 14:26:28 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<CAKJS1f-pCFYGq1-go+ZyAR3GisQo-nTD=7E8ykk7Zqm9w+-OkA@mail.gmail.com>
	<[email protected]>

On Wed, May 15, 2019 at 05:36:32PM +0900, Amit Langote wrote:
> Hi David,
> 
> On 2019/05/15 11:59, David Rowley wrote:
> > Sadly, they can't refer to the release notes for more information
> > since they don't detail what's changed in this area :(
> 
> Bruce seemed to insist on summarizing all the performance-related
> improvements into one item.  Initial wording mentioned just pruning, which
> after some back and forth has finally been turned into:
> 
>   Improve performance of many operations on partitioned tables
>   (Amit Langote, David Rowley, Tom Lane, Álvaro Herrera)
> 
>   Tables with thousands of child partitions can now be processed
>   efficiently by operations that only need to touch a small number of
>   partitions.
> 
> I hear you saying that the description may be too vague *for release
> notes* even though it now covers *all* the performance improvements made
> to address the use cases where small number of partitions are touched.
> Maybe, you're saying that we should've mentioned individual items
> (partition pruning, tuple routing, etc.) at least in the release notes,
> which I did suggest on -committers [1], but maybe Bruce didn't think it
> was necessary to list up individual items.
> 
> That leaves a few other commits mentioned in the release-12.sgml next to
> this item that are really not related to this headline description, which
> both you and I have pointed out in different threads [2][3], but I haven't
> really caught Bruce's position about them.

I think the more specific we make the partition description, the more
limited it will appear to be.  I think almost all partition operations
will appear to be faster with PG 12, even if users can't articulate
exactly why.

-- 
  Bruce Momjian  <[email protected]>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +

view thread (63+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: PostgreSQL 12: Feature Highlights
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox