Skip site navigation (1) Skip section navigation (2)


From: Teodor Sigaev <teodor(at)sigaev(dot)ru>
To: Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: gincostestimate
Date: 2010-07-02 12:33:31
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Patch implements much more accuracy estimation of cost for GIN index scan than 
generic cost estimation function. Basic idea is described on PGCon-2010:, pages 48-54.

After discussion on PGCon, the storage of additional statistic information has 
been changed from pg_class table to meta-page of index. Statistics data is 
cached in Relation->rd_amcache to prevent frequent read of meta-page.

Teodor Sigaev                                   E-mail: teodor(at)sigaev(dot)ru

Attachment: gincostestimate-0.19.gz
Description: application/x-tar (8.3 KB)


pgsql-hackers by date

Next:From: Mike FowlerDate: 2010-07-02 13:07:15
Subject: Re: Issue: Deprecation of the XML2 module'xml_is_well_formed' function
Previous:From: Andrew DunstanDate: 2010-07-02 12:10:25
Subject: Re: pgsql: Allow copydir() to be interrupted.

Privacy Policy | About PostgreSQL
Copyright © 1996-2018 The PostgreSQL Global Development Group