Hi Scott, Le jeudi 14 septembre 2006 à 10:56 -0500, Scott Marlowe a écrit : > 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? > The locale used to run initdb is : su - postgres :~$ locale LANG=POSIX LC_CTYPE="POSIX" LC_NUMERIC="POSIX" LC_TIME="POSIX" LC_COLLATE="POSIX" LC_MONETARY="POSIX" LC_MESSAGES="POSIX" LC_PAPER="POSIX" LC_NAME="POSIX" LC_ADDRESS="POSIX" LC_TELEPHONE="POSIX" LC_MEASUREMENT="POSIX" LC_IDENTIFICATION="POSIX" LC_ALL= Cheers, -- Jérôme, python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for p in 'sioneb@xxxxxxxxxxxxxxxxxxxx'.split('@')])"
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