| From: | "Jaime Casanova" <systemguards(at)gmail(dot)com> |
|---|---|
| To: | Raúl Andrés Duque <ra_duque(at)yahoo(dot)com(dot)mx>, pgsql-es-ayuda(at)postgresql(dot)org |
| Subject: | Re: Optimizar Vista |
| Date: | 2007-04-28 04:14:34 |
| Message-ID: | c2d9e70e0704272114k6282f466q3f7511e66d6a6d16@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-es-ayuda |
On 4/27/07, Alvaro Herrera <alvherre(at)commandprompt(dot)com> wrote:
>
> Para saber si realmente los índices te sirven o no, haces esto sin tener
> el índice:
>
> -- esto te entrega el resultado sin índice
> EXPLAIN ANALYZE SELECT ...
> BEGIN;
> CREATE INDEX foobar ON ...
> -- repites el select de arriba y ahora te da el resultado con índice
> EXPLAIN ANALYZE SELECT ...
>
> COMMIT/ROLLBACK
>
no deberia haber un ANALYZE tabla despues del CREATE INDEX?
--
Atentamente,
Jaime Casanova
"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs and the universe trying
to produce bigger and better idiots.
So far, the universe is winning."
Richard Cook
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Jaime Casanova | 2007-04-28 04:30:33 | Re: Union |
| Previous Message | Victor Lopez | 2007-04-28 04:00:13 | Re: Union |