Re: Inner Join of the same table

Поиск
Список
Период
Сортировка
От Jim Nasby
Тема Re: Inner Join of the same table
Дата
Msg-id 165A9949-55BC-4BFC-9CEF-4F54B23731BE@pervasive.com
обсуждение исходный текст
Ответ на Re: Inner Join of the same table  (Sebastián Baioni <sebaioni-postgresql@yahoo.com.ar>)
Список pgsql-performance
On Aug 15, 2006, at 1:53 PM, Sebastián Baioni wrote:
>  9                          ->  Index Scan using uesapt001 on
> APORTES  (cost=0.00..37301678.64
> rows=9339331 width=25) (actual time=110.000..2520690.000
> rows=9335892 loops=1)

It's taking 2520 seconds to scan an index with 9M rows, which sounds
way, way too slow. I suspect that index got bloated badly at some
point by not vacuuming frequently enough (autovacuum is your friend).
Try reindexing and see if that fixes the problem.
--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461



В списке pgsql-performance по дате отправления:

Предыдущее
От: Michael Stone
Дата:
Сообщение: Re: Postgresql Performance on an HP DL385 and
Следующее
От: Michael Stone
Дата:
Сообщение: Re: Postgresql Performance on an HP DL385 and