Re: ECPG FETCH readahead

Поиск
Список
Период
Сортировка
Искать
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

В списке pgsql-hackers по дате отправления
От: Merlin Moncure
Дата:
Сообщение: Re: JSON for PG 9.2
От: Hannu Krosing
Дата:
Сообщение: Re: JSON for PG 9.2
FAQ