Re: Rename max_parallel_degree?
От | Peter Geoghegan |
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Тема | Re: Rename max_parallel_degree? |
Дата | |
Msg-id | CAH2-WzmUNrKcEaYELuROksx=8QAnoQk7nvkAHj4_8rHgjyPU3g@mail.gmail.com обсуждение исходный текст |
Ответ на | Rename max_parallel_degree? (Bruce Momjian <bruce@momjian.us>) |
Ответы |
Re: Rename max_parallel_degree?
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Список | pgsql-hackers |
On Sat, Apr 23, 2016 at 8:58 PM, Bruce Momjian <bruce@momjian.us> wrote: > Why is the parallelism variable called "max_parallel_degree"? Is that a > descriptive name? What does "degree" mean? Why is it not called > "max_parallel_workers"? I also think that "max_parallel_workers" works better. While certain other systems have a concept of a "maximum parallel degree", it is not the same. Those other systems disable parallelism altogether when "max parallel degree" is 1, whereas Postgres uses 1 parallel worker along with a leader process. And so, parallelism *will* still be used on Postgres. That's a pretty significant difference. -- Peter Geoghegan
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