| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Josh berkus <josh(at)agliodbs(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(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>, Amit Kapila <amit(dot)kapila16(at)gmail(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: | 2016-05-31 20:04:41 |
| Message-ID: | 31423.1464725081@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
> Robert Haas wrote:
>> So I think in the long run we should have three limits:
>>
>> 1. Cluster-wide limit on number of worker processes for all purposes
>> (currently, max_worker_processes).
>>
>> 2. Cluster-wide limit on number of worker processes for parallelism
>> (don't have this yet).
>>
>> 3. Per-operation limit on number of worker processes for parallelism
>> (currently, max_parallel_degree).
>>
>> Whatever we rename, there needs to be enough semantic space between #1
>> and #3 to allow for the possibility - I think the very likely
>> possibility - that we will eventually also want #2.
> max_background_workers sounds fine to me for #1, and I propose to add #2
> in 9.6 rather than wait.
+1 to both points.
> max_total_parallel_query_workers ?
The name should be closely related to what we use for #3. I could go for
max_total_parallel_workers for #2 and max_parallel_workers for #3.
Or maybe max_parallel_workers_total?
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Josh berkus | 2016-05-31 20:06:05 | Re: Rename max_parallel_degree? |
| Previous Message | Robert Haas | 2016-05-31 20:03:46 | Re: Perf Benchmarking and regression. |