Re: TPC-H Q20 from 1 hour to 19 hours!

From: Peter Geoghegan <pg(at)bowt(dot)ie>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Rafia Sabih <rafia(dot)sabih(at)enterprisedb(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>
Subject: Re: TPC-H Q20 from 1 hour to 19 hours!
Date: 2017-06-11 23:39:40
Message-ID: CAH2-Wz=o7r-6p6k+OLHJR9RamY7kVXWo1=rqZ_5ftBt4_xOYNA@mail.gmail.com
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On Sun, Jun 11, 2017 at 4:10 PM, Tomas Vondra
<tomas(dot)vondra(at)2ndquadrant(dot)com> wrote:
> I do strongly recommend reading this paper analyzing choke points of
> individual TPC-H queries:
>
> http://oai.cwi.nl/oai/asset/21424/21424B.pdf
>
> It's slightly orthogonal to the issue at hand (poor estimate in Q20 causing
> choice of inefficient plan), it's a great paper to read. I thought I've
> already posted a link to the this paper sometime in the past, but I don't
> see it in the archives.

Thanks for the tip!

The practical focus of this paper really appeals to me.

--
Peter Geoghegan

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