Re: hashagg slowdown due to spill changes

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: Jeff Davis <pgsql(at)j-davis(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Tomas Vondra <tv(at)fuzzy(dot)cz>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Melanie Plageman <melanieplageman(at)gmail(dot)com>
Subject: Re: hashagg slowdown due to spill changes
Date: 2020-06-15 15:19:52
Message-ID: CA+TgmobaZJOKt6vPOR42O2iwsBkPdv7zeDVNVYSqn8HCu_VVaw@mail.gmail.com
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On Mon, Jun 15, 2020 at 9:34 AM Tomas Vondra
<tomas(dot)vondra(at)2ndquadrant(dot)com> wrote:
> But just reverting 4cad2534d will make this much worse, I think, as
> illustrated by the benchmarks I did in [1].

I share this concern, although I do not know what we should do about it.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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