Re: simple update queries take a long time - postgres 8.3.1

Поиск
Список
Период
Сортировка
От Raymond O'Donnell
Тема Re: simple update queries take a long time - postgres 8.3.1
Дата
Msg-id 47F142AF.1050109@iol.ie
обсуждение исходный текст
Ответ на Re: simple update queries take a long time - postgres 8.3.1  (mark <markkicks@gmail.com>)
Ответы Re: simple update queries take a long time - postgres 8.3.1  (mark <markkicks@gmail.com>)
Re: simple update queries take a long time - postgres 8.3.1  (mark <markkicks@gmail.com>)
Список pgsql-general
On 31/03/2008 20:51, mark wrote:

> can you explain what the numbers mean in the EXPLAIN ANALYZE?
> (cost=0.00..8.46 rows=1 width=1073)  (actual time=0.094..0.161 rows=1
> loops=1)

It's worth reading through the docs at that reference in my previous
email - it's well explained there.

As I understand it, "cost" signifies the planner's estimate of how long
the query will take, in terms of disk page fetches. The "actual time" is
in milliseconds.

Ray.

---------------------------------------------------------------
Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
rod@iol.ie
---------------------------------------------------------------

В списке pgsql-general по дате отправления:

Предыдущее
От: Rainer Bauer
Дата:
Сообщение: Re: [pgsql-general] Daily digest v1.8030 (22 messages)
Следующее
От: mark
Дата:
Сообщение: Re: simple update queries take a long time - postgres 8.3.1