| From: | Stephen Frost <sfrost(at)snowman(dot)net> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Peter Geoghegan <pg(at)bowt(dot)ie>, Jeff Davis <pgsql(at)j-davis(dot)com>, 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 21:52:02 |
| Message-ID: | 20200710215201.GO12375@tamriel.snowman.net |
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| Lists: | pgsql-docs pgsql-hackers |
Greetings,
* Tom Lane (tgl(at)sss(dot)pgh(dot)pa(dot)us) wrote:
> Peter Geoghegan <pg(at)bowt(dot)ie> writes:
> > It now seems likely that the hash_mem/hash_mem_multiplier proposal has
> > the support it needs to get into Postgres 13. Assuming that the
> > proposal doesn't lose momentum, then it's about time to return to the
> > original question you posed at the start of the thread:
>
> > What should we do with the hashagg_avoid_disk_plan GUC (formerly known
> > as the enable_hashagg_disk GUC), if anything?
>
> > I myself think that there is a case to be made for removing it
> > entirely.
>
> +0.5 or so for removing it. It seems too confusing and dubiously
> useful.
I agree that it shouldn't exist.
Thanks,
Stephen
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