Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards
От
Miguel Silva
Тема
Re: Query performance - normal on 9.0.4, slow from 9.0.5
onwards
Дата
Msg-id
4F0198AB.6030405@tactis.pt
Ответ на
Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards (Merlin Moncure)
Список
Дерево обсуждения
Query performance - normal on 9.0.4, slow from 9.0.5 onwards Miguel Silva <miguel.silva@tactis.pt>
Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards Tom Lane <tgl@sss.pgh.pa.us>
Re: Query performance - normal on 9.0.4, slow from 9.0.5
onwards Miguel Silva <miguel.silva@tactis.pt>
Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards Tom Lane <tgl@sss.pgh.pa.us>
Re: Query performance - normal on 9.0.4, slow from 9.0.5
onwards Miguel Silva <miguel.silva@tactis.pt>
Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards Merlin Moncure <mmoncure@gmail.com>
Re: Query performance - normal on 9.0.4, slow from 9.0.5
onwards Miguel Silva <miguel.silva@tactis.pt>
On 30-12-2011 19:35, Merlin Moncure wrote: > try this (curious): > create table pos as select n from generate_series(1,32) n; > > and swap that for the in-query generate series call. your statistics > in the query are completely off (not 100% sure why), so I'm thinking > to replace that since it lies to the planner about the # rows > returned. also the join on the array element probably isn't helping. > > merlin > Tried it. The query still takes around the same amount of time but, out of curiosity, here's the explain analyze of it: http://explain.depesz.com/s/MvE .
В списке pgsql-performance по дате отправления
От: Miguel Silva
Дата: