Yes, you are right but it wasn't the case this time, I have run the explain plenty of
times with same results. I think that the reason was that I made a simple VACUUM,
after a VACUUM FULL ANALYZE (1h!!) things are ok
Best Regards
Edoardo
> -----Messaggio originale-----
> Da: David F. Skoll [mailto:dfs@roaringpenguin.com]
> Inviato: giovedì 5 febbraio 2004 3.17
> A: Edoardo Ceccarelli
> Cc: pgsql-admin@postgresql.org
> Oggetto: Re: R: [ADMIN] slow seqscan after vacuum analize
>
> On Thu, 5 Feb 2004, Edoardo Ceccarelli wrote:
>
> > Things are worst only for seqscan, when it uses indexscan
> timing is good.
>
> It might just be that running VACUUM flushed the operating
> system's buffer cache.
>
> I always try running two or three EXPLAIN ANALYZE's in a row
> for the same query. Usually, the first one takes much longer
> than the rest.
>
> Regards,
>
> David.
>
>
