Re: Performance aggregates

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От Stephan Szabo
Тема Re: Performance aggregates
Дата
Msg-id Pine.BSF.4.21.0105150825190.22428-100000@megazone23.bigpanda.com
обсуждение исходный текст
Ответ на Performance aggregates  (snpe <snpe@infosky.net>)
Ответы Re: Performance aggregates  (snpe <snpe@infosky.net>)
Re: Performance aggregates  (snpe <snpe@infosky.net>)
Список pgsql-general
On Tue, 15 May 2001, snpe wrote:

> Table e_kalkn have 4668 rows and e_kalkns 101170 rows.
>
> Query :
>
> select roba,sum(izn)
>  from e_kalkn k,e_kalkns ks
>  where k.id=ks.id
>  group by roba
>  order by roba
>
> is 2.5 times faster on one commercial database (there are tests on Internet
> that say 'Postgresql is faster than that database).
> I can't say which database it is.

Have you run vacuum analyze (since loading the data) and what does explain
show for the query.  Also, what version are you using?


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