On Tue, Oct 25, 2005 at 22:36:58 -0500, "Jim C. Nasby" <jnasby@xxxxxxxxxxxxx> wrote: > We need the output of EXPLAIN ANALYZE, from both versions if possible. Isn't that going to be a problem in this case since it seems unlikely that EXPLAIN ANALYZE will finish in a reasonable amount of time? > > Also, pgsql-performance would be a better list for this... > > On Tue, Oct 25, 2005 at 05:31:22PM -0600, Sidar L?pez Cruz wrote: > > what happend with postgresql 8.1b4 performance on query? > > > > look at this: > > select count(*) from fotos where archivo not in (select archivo from > > archivos) > > Aggregate (cost=4899037992.36..4899037992.37 rows=1 width=0) > > -> Seq Scan on fotos (cost=22598.78..4899037338.07 rows=261716 width=0) > > Filter: (NOT (subplan)) > > SubPlan > > -> Materialize (cost=22598.78..39304.22 rows=805344 width=58) > > -> Seq Scan on archivos (cost=0.00..13141.44 rows=805344 > > width=58) > > > > I WILL DIE WAITING FOR QUERY RESPONSE !!! > > -- > > CREATE TABLE archivos ( archivo varchar(20)) WITHOUT OIDS; > > CREATE INDEX archivos_archivo_idx ON archivos USING btree(archivo); > > ~800000 rows > > -- > > CREATE TABLE fotos > > ( > > cedula varchar(20), > > nombre varchar(100), > > apellido1 varchar(100), > > apellido2 varchar(100), > > archivo varchar(20) > > ) WITHOUT OIDS; > > CREATE INDEX fotos_archivo_idx ON fotos USING btree (archivo); > > CREATE INDEX fotos_cedula_idx ON fotos USING btree (cedula); > > ~500000 rows > > > > _________________________________________________________________ > > Charla con tus amigos en l?nea mediante MSN Messenger: > > http://messenger.latam.msn.com/ > > > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 5: don't forget to increase your free space map settings > > > > -- > Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx > Pervasive Software http://pervasive.com work: 512-231-6117 > vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 > > ---------------------------(end of broadcast)--------------------------- > TIP 3: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faq ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to majordomo@xxxxxxxxxxxxxx so that your message can get through to the mailing list cleanly
