Re: Queries 15 times slower on 8.1 beta 2 than on 8.0

Поиск
Список
Период
Сортировка
От John Arbash Meinel
Тема Re: Queries 15 times slower on 8.1 beta 2 than on 8.0
Дата
Msg-id 433326A6.8010708@arbash-meinel.com
обсуждение исходный текст
Ответ на Queries 15 times slower on 8.1 beta 2 than on 8.0  ("Jean-Pierre Pelletier" <pelletier_32@sympatico.ca>)
Список pgsql-performance
Jean-Pierre Pelletier wrote:
> Hi,
>
> I've got many queries running much slower on 8.1 beta2 than on 8.0.1
> Here is a simplified one that takes 484 ms on 8.1 and 32 ms on 8.0.1.
>
> select
>   0
> from
>   Content C
>
>   left outer join Supplier S
>   on  C.SupplierId = S.SupplierId
>
>   left outer join Price P
>   on C.PriceId = P.PriceId;
>
> Any ideas why it's slower?

You really have to post the results of "EXPLAIN ANALYZE" not just
explain. So that we can tell what the planner is expecting, versus what
really happened.

John
=:->

>
> Thanks
> Jean-Pierre Pelletier
> e-djuster
>

Вложения

В списке pgsql-performance по дате отправления:

Предыдущее
От: "Jean-Pierre Pelletier"
Дата:
Сообщение: Re: Queries 15 times slower on 8.1 beta 2 than on 8.0
Следующее
От: "Jean-Pierre Pelletier"
Дата:
Сообщение: Re: Queries 15 times slower on 8.1 beta 2 than on 8.0