| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | Stephen Frost <sfrost(at)snowman(dot)net>, 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>, David Rowley <dgrowleyml(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: | 2020-07-10 18:34:44 |
| Message-ID: | 29847045df67838cd72dc2dfe830a11642fb7153.camel@j-davis.com |
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| Lists: | pgsql-docs pgsql-hackers |
On Fri, 2020-07-10 at 13:46 -0400, Tom Lane wrote:
> I looked over Peter's patch in [1], and it seems generally pretty
> sane to me, though I concur with the idea that it'd be better to
> define the GUC as a multiplier for work_mem. (For one thing, we
> could
> then easily limit it to be at least 1.0, ensuring sanity; also, if
> work_mem does eventually become more dynamic than it is now, we might
> still be able to salvage this knob as something useful. Or if not,
> we just rip it out.) So my vote is for moving in that direction.
In that case, I will hold off on my "escape-hatch" GUC.
Regards,
Jeff Davis
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