On Thu, 2006-09-14 at 10:02, Dave Dutcher wrote: > > -----Original Message----- > > From: pgsql-performance-owner@xxxxxxxxxxxxxx > > [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx] On Behalf Of > > Jérôme BENOIS > > > explain analyze select distinct > > INTEGER_VALUE,DATE_VALUE,EI_ID,VALUE_TYPE,FLOAT_VALUE,ID,TEXT_ > > VALUE,CATEGORY_ID,STRING_VALUE,CATEGORYATTR_ID,NAME from ((( > > select distinct ei_id as EIID from mpng2_ei_attribute as > > reqin1 where reqin1.CATEGORYATTR_ID = 0 AND reqin1.TEXT_VALUE > > ilike '' and ei_id in ( select distinct ei_id as EIID from > > mpng2_ei_attribute as reqin2 where reqin2.CATEGORYATTR_ID = 0 > > AND reqin2.TEXT_VALUE ilike '' and ei_id in ( select distinct > > ei_id as EIID from mpng2_ei_attribute as reqin3 where > > reqin3.NAME = '' AND reqin3.STRING_VALUE = '' ) ) ) ) ) as > > req0 join mpng2_ei_attribute on req0.eiid = > > mpng2_ei_attribute.ei_id order by ei_id asc; > > > That is a lot of distinct's. Sorts are one thing that can really use up > CPU. This query is doing lots of sorts, so its not surprising the CPU usage > is high. I'm gonna make a SWAG here and guess that maybe your 7.4 db was initdb'd with a locale of C and the new one is initdb'd with a real locale, like en_US. Can Jérôme confirm or deny this?
