| From: | "Edoardo Ceccarelli" <eddy(at)expot(dot)it> |
|---|---|
| To: | "'Sam Barnett-Cormack'" <s(dot)barnett-cormack(at)lancaster(dot)ac(dot)uk> |
| Cc: | "'scott(dot)marlowe'" <scott(dot)marlowe(at)ihs(dot)com>, <pgsql-admin(at)postgresql(dot)org> |
| Subject: | R: R: slow seqscan after vacuum analize |
| Date: | 2004-02-05 02:10:13 |
| Message-ID: | 2s28b9$kqpdm@mailr-1.tiscali.it |
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| Thread: | |
| Lists: | pgsql-admin |
> > AFTER (actual db)
> > portaportese=# explain analyze SELECT * FROM utente where
> luogorilasciodoc='ciao';
> > QUERY PLAN
> >
> >
> ----------------------------------------------------------------------
> > ----------------
> > --------------------
> > Seq Scan on utente (cost=0.00..92174.50 rows=3 width=724) (actual
> > time=705.41..6458.19 rows=15 loops=1)
> > Filter: (luogorilasciodoc = 'ciao'::bpchar) Total
> runtime: 6458.29
> > msec
> > (3 rows
After a VACUUM FULL ANALYZE:
portaportese=# explain analyze SELECT * FROM utente where luogorilasciodoc='ciao';
QUERY PLAN
--------------------------------------------------------------------------------------
--------------------
Seq Scan on utente (cost=0.00..41329.21 rows=154 width=724) (actual
time=91.61..751.28 rows=15 loops=1)
Filter: (luogorilasciodoc = 'ciao'::bpchar)
Total runtime: 751.35 msec
Things are better now! :) it surely was because i have used the normal vacuum...
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