Re: Overriding the optimizer
От | Craig A. James |
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Тема | Re: Overriding the optimizer |
Дата | |
Msg-id | 43A236BC.1070300@modgraph-usa.com обсуждение исходный текст |
Ответ на | Re: Overriding the optimizer (Christopher Kings-Lynne <chriskl@familyhealth.com.au>) |
Список | pgsql-performance |
Christopher Kings-Lynne wrote: > So your main example bad query is possibly just a case of lack of > analyze stats and wrong postgresql.conf config? And that's what causes > you to shut down your database? Don't you want your problem FIXED? I'm trying to help by raising a question that I think is important, and have an honest, perhaps vigorous, but respectful,discussion about it. I respect everyone's opinion, and I hope you respect mine. I've been in this business along time, and I don't raise issues lightly. Yes, I want my query fixed. And I may post it, in a thread with a new title. In fact, I posted a different query with essentiallythe same problem a while back and got nothing that helped: http://archives.postgresql.org/pgsql-performance/2005-11/msg00133.php (I can't help but point out that Tom's response was to suggest a way to fool the optimizer so as to prevent it from "optimizing"the query. In other words, he told me a trick that would force a particular plan on the optimizer. Which isexactly the point of this discussion.) The point is that the particular query is not relevant -- it's the fact that this topic (according to Tom) has been and continuesto be raised. This should tell us all something, that it's not going to go away, and that it's a real issue. Regards, Craig
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