Re: Performance regression with PostgreSQL 11 and partitioning

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, Thomas Reiss <thomas(dot)reiss(at)dalibo(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Performance regression with PostgreSQL 11 and partitioning
Date: 2018-06-25 22:48:23
Message-ID: 20180625224823.ejmjg2wexxtbixvn@alvherre.pgsql
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On 2018-Jun-18, David Rowley wrote:

> I've attached a patch which cleans up my earlier version and moves the
> setup of the append_rel_array into its own function instead of
> sneaking code into setup_simple_rel_arrays(). I've also now updated
> the comment above find_childrel_appendrelinfo(), which is now an
> unused function.

I checked that this patch fixes the originally reported performance
regression.

Unless there are objections, I intend to push this patch tomorrow.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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