From:
Greg Smith <greg(at)2ndquadrant(dot)com>
To:
Joachim Wieland <joe(at)mcknight(dot)de>
Cc:
Greg Stark <gsstark(at)mit(dot)edu>, Robert Haas <robertmhaas(at)gmail(dot)com>,
Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,
PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject:
Re: Re: Hot Standby query cancellation and Streaming Replication
integration
Date:
2010-02-28 20:21:23
Message-ID:
4B8AD043.4070208@2ndquadrant.com (view raw or flat )
Thread:
2010-02-26 08:33:35 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-26 12:10:07 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-26 18:53:16 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-02-26 19:01:30 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-26 19:06:51 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-26 19:16:40 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-02-26 20:02:08 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-26 20:22:56 from "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
2010-02-26 20:04:23 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-26 20:21:05 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-02-26 20:10:11 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-26 20:25:33 from Aidan Van Dyk <aidan(at)highrise(dot)ca>
2010-02-26 20:30:01 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-02-26 21:06:10 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-26 21:11:32 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-26 21:19:39 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-02-26 21:22:47 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-26 21:44:20 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-02-27 04:02:24 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-28 21:58:51 from Simon Riggs <simon(at)2ndQuadrant(dot)com>
2010-02-27 06:53:24 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-26 21:39:12 from Dimitri Fontaine <dfontaine(at)hi-media(dot)com>
2010-02-26 21:48:38 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-26 22:11:28 from Dimitri Fontaine <dfontaine(at)hi-media(dot)com>
2010-02-26 22:20:37 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-27 09:07:32 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-27 09:33:34 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-26 23:56:55 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 00:36:57 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-27 02:43:58 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 03:40:57 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-27 04:38:38 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 04:53:48 from Aidan Van Dyk <aidan(at)highrise(dot)ca>
2010-02-27 05:08:35 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 20:31:06 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-27 22:09:59 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 22:26:22 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-28 02:14:28 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-28 05:28:17 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-28 06:01:49 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-28 06:18:00 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 00:43:48 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-27 01:53:13 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 02:30:56 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-27 03:11:49 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 22:28:49 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-27 23:49:09 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 03:59:41 from "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
2010-02-27 04:31:12 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 14:34:08 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-26 23:33:57 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 00:21:11 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-27 06:59:10 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-27 14:56:51 from Tatsuo Ishii <ishii(at)postgresql(dot)org>
2010-02-28 01:00:52 from Robert Haas <robertmhaas(at)gmail(dot)com>
2010-02-28 06:07:20 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-28 13:54:48 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-28 15:56:28 from Joachim Wieland <joe(at)mcknight(dot)de>
2010-02-28 19:47:38 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-28 20:48:51 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-28 22:38:28 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-01 03:00:09 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-01 17:50:52 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-01 18:26:09 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-01 18:46:29 from Greg Stark <gsstark(at)mit(dot)edu>
2010-03-01 19:21:48 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-01 19:32:24 from Greg Stark <gsstark(at)mit(dot)edu>
2010-03-01 19:35:37 from Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>
2010-03-01 19:43:13 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-03-01 20:04:41 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-02 01:34:53 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-02 20:57:39 from Simon Riggs <simon(at)2ndQuadrant(dot)com>
2010-03-02 20:58:03 from Simon Riggs <simon(at)2ndQuadrant(dot)com>
2010-03-02 21:36:52 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-02 23:39:10 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-01 03:12:22 from Robert Haas <robertmhaas(at)gmail(dot)com>
2010-03-01 22:32:01 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-01 22:52:50 from "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
2010-03-02 00:46:22 from Greg Stark <stark(at)mit(dot)edu>
2010-03-02 01:04:11 from Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
2010-03-02 02:08:27 from Aidan Van Dyk <aidan(at)highrise(dot)ca>
2010-03-02 01:50:28 from Robert Haas <robertmhaas(at)gmail(dot)com>
2010-03-02 06:21:10 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-02 04:56:45 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-28 20:54:52 from Dimitri Fontaine <dfontaine(at)hi-media(dot)com>
2010-02-28 21:42:00 from Joachim Wieland <joe(at)mcknight(dot)de>
2010-02-28 20:21:23 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-02 04:54:04 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-02 05:50:08 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-02 18:30:15 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-02 18:34:33 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-02 20:11:00 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-03-02 23:44:16 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-10 06:29:19 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-10 11:38:12 from Greg Stark <gsstark(at)mit(dot)edu>
2010-03-10 18:59:50 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-11 00:51:29 from Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
2010-03-11 01:39:37 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-03-11 05:58:35 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-02 19:03:14 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-03-02 21:00:24 from Simon Riggs <simon(at)2ndQuadrant(dot)com>
2010-02-26 14:10:26 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-26 14:24:30 from Richard Huxton <dev(at)archonet(dot)com>
2010-02-26 18:47:09 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-27 00:11:36 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 00:54:57 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-27 02:52:12 from Greg Smith <greg(at)2ndquadrant(dot)com>
2010-02-27 02:56:01 from Bruce Momjian <bruce(at)momjian(dot)us>
2010-02-26 14:17:23 from Richard Huxton <dev(at)archonet(dot)com>
2010-02-26 14:45:07 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-26 14:57:16 from Richard Huxton <dev(at)archonet(dot)com>
2010-02-26 15:21:03 from Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
2010-02-26 17:45:33 from Robert Haas <robertmhaas(at)gmail(dot)com>
2010-02-26 19:02:12 from Josh Berkus <josh(at)agliodbs(dot)com>
2010-02-26 16:43:24 from Richard Huxton <dev(at)archonet(dot)com>
2010-02-26 17:46:15 from Greg Stark <gsstark(at)mit(dot)edu>
2010-02-28 22:15:18 from Simon Riggs <simon(at)2ndQuadrant(dot)com>
Lists:
pgsql-hackers
Joachim Wieland wrote:
> Instead, I assume that most people who will grab 9.0 and use HS+SR do
> already have a database with a certain query profile. Now with HS+SR
> they will try to put the most costly and longest read-only queries to
> the standby but in the end will run the same number of queries with
> the same overall complexity.
>
This is a nice summary of the primary use-case I am trying to optimize
usability for, because I know for a fact there's a stack of pent-up
requests for exactly this form of improvement from existing warm standby
users. And your subsequent discussion of how administrators will react
in each of the possible configurations here matches my own concerns. I
would highly recommend anyone who feels this is not a critical feature
to fix carefully read Joachim's message from an advocacy perspective,
that's a better user-oriented prediction than mine of exactly how this
is going to play out in the field post-release.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com www.2ndQuadrant.us
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