Re: hashagg slowdown due to spill changes

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-hackers(at)postgresql(dot)org, Jeff Davis <pgsql(at)j-davis(dot)com>
Subject: Re: hashagg slowdown due to spill changes
Date: 2020-06-08 20:15:17
Message-ID: 20200608201517.GA1156@alvherre.pgsql
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On 2020-Jun-05, Andres Freund wrote:

> While preparing my pgcon talk I noticed that our hash-agg performance
> degraded noticeably. Looks to me like it's due to the spilling-hashagg
> changes.

Jeff, what are your thoughts on this?

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

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