Re: ECPG FETCH readahead
От
Michael Meskes
Тема
Re: ECPG FETCH readahead
Дата
Msg-id
20120416160448.GA9968@feivel.credativ.lan
Ответ на
Re: ECPG FETCH readahead (Boszormenyi Zoltan)
Список
Дерево обсуждения
ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Bruce Momjian <bruce@momjian.us>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Böszörményi Zoltán <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead PostgreSQL - Hans-Jürgen Schönig<postgres@cybertec.at>
Re: ECPG FETCH readahead Böszörményi Zoltán <zb@cybertec.at>
Re: ECPG FETCH readahead Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Robert Haas <robertmhaas@gmail.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Robert Haas <robertmhaas@gmail.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
New ECPG idea, was: Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Proposal: UPDATE/DELETE ... WHERE OFFSET n OF cursor_name, was: Re:
New ECPG idea, was: Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Peter Eisentraut <peter_e@gmx.net>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Peter Eisentraut <peter_e@gmx.net>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Alvaro Herrera <alvherre@2ndquadrant.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
ECPG fixes, was: Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Modify the DECLARE CURSOR command tag depending on the scrollable
flag Boszormenyi Zoltan <zb@cybertec.at>
Re: Modify the DECLARE CURSOR command tag depending on the scrollable flag Tom Lane <tgl@sss.pgh.pa.us>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Boszormenyi Zoltan <zb@cybertec.at>
Re: Modify the DECLARE CURSOR command tag depending on the scrollable flag Tom Lane <tgl@sss.pgh.pa.us>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Boszormenyi Zoltan <zb@cybertec.at>
Re: Modify the DECLARE CURSOR command tag depending on the scrollable flag Tom Lane <tgl@sss.pgh.pa.us>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Peter Eisentraut <peter_e@gmx.net>
Re: Modify the DECLARE CURSOR command tag depending on the scrollable flag Tom Lane <tgl@sss.pgh.pa.us>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Peter Eisentraut <peter_e@gmx.net>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Boszormenyi Zoltan <zb@cybertec.at>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Boszormenyi Zoltan <zb@cybertec.at>
Re: Modify the DECLARE CURSOR command tag depending on the
scrollable flag Michael Meskes <meskes@postgresql.org>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Boszormenyi Zoltan <zb@cybertec.at>
Re: Modify the DECLARE CURSOR command tag depending on the
scrollable flag Alvaro Herrera <alvherre@2ndquadrant.com>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Peter Eisentraut <peter_e@gmx.net>
Re: Modify the DECLARE CURSOR command tag depending on
the scrollable flag Boszormenyi Zoltan <zb@cybertec.at>
ECPG infrastructure changes part 1, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG infrastructure changes part 1, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Review: ECPG infrastructure changes part 1, was: Re: ECPG
fixes Antonin Houska <antonin.houska@gmail.com>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Alvaro Herrera <alvherre@2ndquadrant.com>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Alvaro Herrera <alvherre@2ndquadrant.com>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Boszormenyi Zoltan <zboszor@pr.hu>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Antonin Houska <antonin.houska@gmail.com>
Re: Review: ECPG infrastructure changes part 1, was: Re:
ECPG fixes Peter Eisentraut <peter_e@gmx.net>
ECPG infrastructure changes, part 2, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
ECPG infrastructure changes, part 3, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
ECPG infrastructure changes, part 4, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
ECPG infrastructure changes, part 5, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
ECPG FETCH readahead, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Followup patches for ECPG readahead, was: Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Peter Eisentraut <peter_e@gmx.net>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Alvaro Herrera <alvherre@2ndquadrant.com>
Re: ECPG FETCH readahead, was: Re: ECPG fixes Boszormenyi Zoltan <zboszor@pr.hu>
ECPG FETCH readahead Boszormenyi Zoltan <zboszor@pr.hu>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zboszor@pr.hu>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zboszor@pr.hu>
Review: ECPG FETCH readahead Antonin Houska <antonin.houska@gmail.com>
Re: Review: ECPG FETCH readahead Alvaro Herrera <alvherre@2ndquadrant.com>
Re: Review: ECPG FETCH readahead Antonin Houska <antonin.houska@gmail.com>
Re: Review: ECPG FETCH readahead Noah Misch <noah@leadboat.com>
Re: Review: ECPG FETCH readahead Michael Meskes <meskes@postgresql.org>
Re: Review: ECPG FETCH readahead Boszormenyi Zoltan <zboszor@pr.hu>
Re: Review: ECPG FETCH readahead Alvaro Herrera <alvherre@2ndquadrant.com>
Re: Review: ECPG FETCH readahead Boszormenyi Zoltan <zboszor@pr.hu>
Re: Review: ECPG FETCH readahead Boszormenyi Zoltan <zboszor@pr.hu>
Re: Review: ECPG FETCH readahead Antonin Houska <antonin.houska@gmail.com>
Re: ECPG FETCH readahead Boszormenyi Zoltan <zb@cybertec.at>
Re: ECPG FETCH readahead Böszörményi Zoltán <zb@cybertec.at>
On Mon, Apr 16, 2012 at 06:24:57AM +0200, Boszormenyi Zoltan wrote: > Yes, just like when the readahead window set to 256, FETCH 1024 > will iterate through 4 windows or FETCH 64 iterates through the > same window 4 times. This is the idea behind the "readahead window". Really? It's definitely not the idea behind FETCH 1024. Using the same window 4 times for FETCH 64 is the idea though, I agree. > How about allowing the readahead window to be resized for the > non-decorated case if the runtime encounters FETCH N and N is > greater than the previous window? To be resized by what? IMO a FETCH N should always be a FETCH N, no matter what, i.e. if the readahead window is larger, use it, but even if it's smaller we should still fetch N at the same time. Michael -- Michael Meskes Michael at Fam-Meskes dot De, Michael at Meskes dot (De|Com|Net|Org) Michael at BorussiaFan dot De, Meskes at (Debian|Postgresql) dot Org Jabber: michael.meskes at googlemail dot com VfL Borussia! Força Barça! Go SF 49ers! Use Debian GNU/Linux, PostgreSQL
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