| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | James Coleman <jtc331(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Parallelize correlated subqueries that execute within each worker |
| Date: | 2021-12-03 07:35:08 |
| Message-ID: | YanIrCPfvgfITO5R@paquier.xyz |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Mon, Nov 15, 2021 at 10:01:37AM -0500, Robert Haas wrote:
> On Wed, Nov 3, 2021 at 1:34 PM James Coleman <jtc331(at)gmail(dot)com> wrote:
>> As I understand the current code, parallel plans are largely chosen
>> based not on where it's safe to insert a Gather node but rather by
>> determining if a given path is parallel safe. Through that lens params
>> are a bit of an odd man out -- they aren't inherently unsafe in the
>> way a parallel-unsafe function is, but they can only be used in
>> parallel plans under certain conditions (whether because of project
>> policy, performance, or missing infrastructure).
>
> Right.
Please note that the CF bot is complaining here, so I have moved this
patch to the next CF, but changed the status as waiting on author.
--
Michael
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Michael Paquier | 2021-12-03 07:36:45 | Re: Speed up transaction completion faster after many relations are accessed in a transaction |
| Previous Message | Michael Paquier | 2021-12-03 07:31:36 | Re: libpq compression |