Re: Vacuum: allow usage of more than 1GB of work mem

Поиск
Список
Период
Сортировка
От Peter Geoghegan
Тема Re: Vacuum: allow usage of more than 1GB of work mem
Дата
Msg-id CAM3SWZRG7KP4dNCKpNonrVhkX0jdmbJ6v2DP2UD379b3edNmmg@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Vacuum: allow usage of more than 1GB of work mem  (Robert Haas <robertmhaas@gmail.com>)
Список pgsql-hackers
On Tue, Sep 13, 2016 at 11:51 AM, Robert Haas <robertmhaas@gmail.com> wrote:
> I think it's probably wrong to worry that an array-of-arrays is going
> to be meaningfully slower than a single array here.  It's basically
> costing you some small number of additional memory references per
> tuple, which I suspect isn't all that relevant for a bulk operation
> that does I/O, writes WAL, locks buffers, etc.

This analysis makes perfect sense to me.


-- 
Peter Geoghegan



В списке pgsql-hackers по дате отправления:

Предыдущее
От: Andres Freund
Дата:
Сообщение: Re: kqueue
Следующее
От: Robert Haas
Дата:
Сообщение: Re: Patch: Implement failover on libpq connect level.