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From: Ron <ronljohnsonjr@gmail.com>
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: Large number of partitions of a table
Date: Mon, 17 Jan 2022 11:28:15 -0600
Message-ID: <6c8f3a3d-e3c3-10c6-8311-b01606b937e7@gmail.com> (raw)
In-Reply-To: <CAKFQuwZ9NnniDeSsMrv1ewZr8BY5XmHvbo=7HfEuTNY39KgkdA@mail.gmail.com>
References: <YeTYA63gEXNePfkv@admin.sibptus.ru>
	<3919502.1642393668@sss.pgh.pa.us>
	<YeUAx56Juri43xGY@admin.sibptus.ru>
	<671340a5-1960-e5dc-1d09-4b7f36cda2c8@gmail.com>
	<3992395.1642431512@sss.pgh.pa.us>
	<CAKFQuwZ9NnniDeSsMrv1ewZr8BY5XmHvbo=7HfEuTNY39KgkdA@mail.gmail.com>

On 1/17/22 9:14 AM, David G. Johnston wrote:
> On Mon, Jan 17, 2022 at 7:58 AM Tom Lane <tgl@sss.pgh.pa.us 
> <mailto:tgl@sss.pgh.pa.us>> wrote:
>
>     Ron <ronljohnsonjr@gmail.com <mailto:ronljohnsonjr@gmail.com>> writes:
>     > On 1/16/22 11:38 PM, Victor Sudakov wrote:
>     >> so no query should ever have to use more than 1 partition.
>
>     > I find it hard to believe that you'll *never* run a report against more
>     > customers than are in a single partition.
>
>     Yeah, I'm a little suspicious of that.
>
>
> Is "never" really the correct threshold here?

That's what OP wrote, and that's what we're dubious about.  Users who know a 
bit too much to be dangerous write a scary about of unexpected queries.

-- 
Angular momentum makes the world go 'round.

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