Re: testing HS/SR - 1 vs 2 performance

Поиск
Список
Период
Сортировка
От Robert Haas
Тема Re: testing HS/SR - 1 vs 2 performance
Дата
Msg-id s2y603c8f071004120617w8bdc9287x102befe88f6b1037@mail.gmail.com
обсуждение исходный текст
Ответ на Re: testing HS/SR - 1 vs 2 performance  (Jim Mlodgenski <jimmy76@gmail.com>)
Список pgsql-hackers
On Mon, Apr 12, 2010 at 8:32 AM, Jim Mlodgenski <jimmy76@gmail.com> wrote:
>> I think we need to investigate this more.  It's not going to look good
>> for the project if people find that a hot standby server runs two
>> orders of magnitude slower than the primary.
> As a data point, I did a read only pgbench test and found that the
> standby runs about 15% slower than the primary with identical hardware
> and configs.

Hmm.  That's not great, but it's a lot better than 50x.  I wonder what
was different in Erik's environment.  Does running in standby mode use
more memory, such that it might have pushed the machine over the line
into swap?

Or if it's CPU load, maybe Erik could gprof it?

...Robert


В списке pgsql-hackers по дате отправления:

Предыдущее
От: Robert Haas
Дата:
Сообщение: Re: Streaming replication and a disk full in primary
Следующее
От: Aidan Van Dyk
Дата:
Сообщение: Re: testing HS/SR - 1 vs 2 performance