Re: hashagg slowdown due to spill changes

From: Jeff Davis <pgsql(at)j-davis(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers(at)lists(dot)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: hashagg slowdown due to spill changes
Date: 2020-06-11 18:14:02
Message-ID: 8feb70055d46e1dcfa44fb80ec575e4e0f0cd933.camel@j-davis.com
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On Thu, 2020-06-11 at 10:45 -0700, Andres Freund wrote:
> Did you run any performance tests?

Yes, I reproduced your ~12% regression from V12, and this patch nearly
eliminated it for me.

Regards,
Jeff Davis

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