Re: [HACKERS] Parallel Append implementation

Поиск
Список
Период
Сортировка
От Amit Khandekar
Тема Re: [HACKERS] Parallel Append implementation
Дата
Msg-id CAJ3gD9ctD=heQAzj4nJSuv7aKhiCt4+q_p+7pM3jQW+bvwksxw@mail.gmail.com
обсуждение исходный текст
Ответ на Re: [HACKERS] Parallel Append implementation  (Amit Khandekar <amitdkhan.pg@gmail.com>)
Ответы Re: [HACKERS] Parallel Append implementation  (Robert Haas <robertmhaas@gmail.com>)
Список pgsql-hackers
> On 14 February 2017 at 22:35, Robert Haas <robertmhaas@gmail.com> wrote:
>> For example, suppose that I have a scan of two children, one
>> of which has parallel_workers of 4, and the other of which has
>> parallel_workers of 3.  If I pick parallel_workers of 7 for the
>> Parallel Append, that's probably too high.

In the patch, in such case, 7 workers are indeed selected for Parallel
Append path, so that both the subplans are able to execute in parallel
with their full worker capacity. Are you suggesting that we should not
?



В списке pgsql-hackers по дате отправления:

Предыдущее
От: Thomas Munro
Дата:
Сообщение: Re: [HACKERS] SERIALIZABLE with parallel query
Следующее
От: Heikki Linnakangas
Дата:
Сообщение: Re: [HACKERS] SCRAM authentication, take three