Re: Script to compute randon page cost

Поиск
Список
Период
Сортировка
От Hans-Jürgen Schönig
Тема Re: Script to compute randon page cost
Дата
Msg-id 3D7C58CE.2030002@cybertec.at
обсуждение исходный текст
Ответ на Re: Script to compute randon page cost  ("Christopher Kings-Lynne" <chriskl@familyhealth.com.au>)
Ответы Re: Script to compute randon page cost  (Brett Schwarz <brett_schwarz@yahoo.com>)
Список pgsql-hackers
Christopher Kings-Lynne wrote:

>Assuming it's giving out correct information, there seems to be a lot of
>evidence for dropping the default random_page_cost to 1...
>
>Chris
>  
>
Some time ago Joe Conway suggest a tool based on a genetic algorithm 
which tries to find the best parameter settings.
As input the user could use a set of SQL statements. The algorithm will 
try to find those settings which lead to the lowest execution time based 
on the set of SQL.

What about something like that?
This way people could tune the database theirselves.
   Hans


-- 
*Cybertec Geschwinde u Schoenig*
Ludo-Hartmannplatz 1/14, A-1160 Vienna, Austria
Tel: +43/1/913 68 09; +43/664/233 90 75
www.postgresql.at <http://www.postgresql.at>, cluster.postgresql.at 
<http://cluster.postgresql.at>, www.cybertec.at 
<http://www.cybertec.at>, kernel.cybertec.at <http://kernel.cybertec.at>



В списке pgsql-hackers по дате отправления:

Предыдущее
От: "Christopher Kings-Lynne"
Дата:
Сообщение: Re: Script to compute randon page cost
Следующее
От: Curt Sampson
Дата:
Сообщение: Re: Script to compute random page cost