| From: | Josh berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Peter Geoghegan <pg(at)heroku(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Rename max_parallel_degree? |
| Date: | 2016-06-02 19:52:09 |
| Message-ID: | 57508E69.9000505@agliodbs.com |
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| Lists: | pgsql-hackers |
On 06/02/2016 08:53 AM, Tom Lane wrote:
> Josh berkus <josh(at)agliodbs(dot)com> writes:
>> On 06/02/2016 04:58 AM, Robert Haas wrote:
>>> Well, I think we could drop node, if you like. I think parallel
>>> wouldn't be good to drop, though, because it sounds like we want a
>>> global limit on parallel workers also, and that can't be just
>>> max_workers. So I think we should keep parallel in there for all of
>>> them, and have max_parallel_workers and
>>> max_parallel_workers_per_gather(_node). The reloption and the Path
>>> struct field can be parallel_workers rather than parallel_degree.
>
>> So does that mean we'll rename it if you manage to implement a parameter
>> which controls the number of workers for the whole statement?
>
> That would fit in as something like max_parallel_workers_per_statement.
ETOOMANYKNOBS
I'm trying to think of some way we can reasonably automate this for
users ...
--
--
Josh Berkus
Red Hat OSAS
(any opinions are my own)
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