Re: different query plan for same select

От: Tom Lane
Тема: Re: different query plan for same select
Дата: ,
Msg-id: 13276.1058973666@sss.pgh.pa.us
(см: обсуждение, исходный текст)
Ответ на: different query plan for same select  (Jörg Schulz)
Ответы: Re: different query plan for same select  (Jörg Schulz)
Список: pgsql-performance

=?iso-8859-1?q?J=F6rg=20Schulz?= <> writes:
> I'm not very familar with the output of the explain command but can you
> tell me why I get two different query plans?

Judging from the suspiciously round numbers in the cost estimates,
you've never done a VACUUM ANALYZE on any of these tables.  Try that and
then see what plans you get...

            regards, tom lane


В списке pgsql-performance по дате сообщения:

От: "Guthrie, Jeremy"
Дата:
Сообщение: Re: slow table updates
От: Jörg Schulz
Дата:
Сообщение: Re: different query plan for same select