Re: hashagg slowdown due to spill changes - Mailing list pgsql-hackers

From Jeff Davis
Subject Re: hashagg slowdown due to spill changes
Date
Msg-id e19a19bf2ec75db916ad85f324cb3596c4d8e196.camel@j-davis.com
Whole thread Raw
In response to Re: hashagg slowdown due to spill changes  (Andres Freund <andres@anarazel.de>)
Responses Re: hashagg slowdown due to spill changes  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
List pgsql-hackers
On Sun, 2020-06-14 at 11:14 -0700, Andres Freund wrote:
> I'm somewhat inclined to think that we should revert 4cad2534da6 and
> then look at how precisely to tackle this in 14.

I'm fine with that.

> It'd probably make sense to request small tlists when the number of
> estimated groups is large, and not otherwise.

That seems like a nice compromise that would be non-invasive, at least
for create_agg_plan().

Regards,
    Jeff Davis





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