Re: Include Lists for Text Search

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От Simon Riggs
Тема Re: Include Lists for Text Search
Дата
Msg-id 1189432182.4281.252.camel@ebony.site
обсуждение исходный текст
Ответ на Re: Include Lists for Text Search  (Teodor Sigaev <teodor@sigaev.ru>)
Ответы Re: Include Lists for Text Search  (Oleg Bartunov <oleg@sai.msu.su>)
Список pgsql-hackers
On Mon, 2007-09-10 at 16:48 +0400, Teodor Sigaev wrote:
> > There are clear indications that indexing too many words is a problem
> > for both GIN and GIST. If people already know what they'll be looking

GIN is great, sorry if that sounded negative.

> GIN doesn't depend strongly on number of words. It has log(N) behaviour for 
> numbers of words because of using B-Tree over words.

log(N) in the number of distinct words, but every word you index results
in an index insert, so if we index more words than we need then the
insert rate will go down.

--  Simon Riggs 2ndQuadrant  http://www.2ndQuadrant.com



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