| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | David Rowley <dgrowleyml(at)gmail(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | Peter Geoghegan <pg(at)bowt(dot)ie>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Bruce Momjian <bruce(at)momjian(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Default setting for enable_hashagg_disk |
| Date: | 2020-07-13 14:51:03 |
| Message-ID: | 5cf74833a830e76cc7cc7506aa77bd6ab0c94f4c.camel@j-davis.com |
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| Lists: | pgsql-docs pgsql-hackers |
On Tue, 2020-07-14 at 02:25 +1200, David Rowley wrote:
> Updated summary:
> * For hash_mem = Tomas [7], Justin [16]
> * For hash_mem_multiplier with a default > 1.0 = DavidG [21]
> * For hash_mem_multiplier with default = 1.0 = PeterG [15][0], Tom
> [20][24]
I am OK with these options, but I still prefer a simple escape hatch.
> * Maybe do nothing until we see how things go during beta = Bruce
> [3], Amit [10]
> * Just let users set work_mem = Stephen [21], Alvaro [4] (Alvaro
> changed his mind after Andres pointed out that changes other nodes in
> the plan too [25])
I am not on board with these options.
Regards,
Jeff Davis
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