| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Greg Stark <stark(at)mit(dot)edu>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
| Subject: | Re: Freeze avoidance of very large table. |
| Date: | 2015-11-13 19:42:55 |
| Message-ID: | 20151113194255.GB27916@momjian.us |
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| Lists: | pgsql-hackers |
On Tue, Nov 3, 2015 at 09:03:49AM +0530, Amit Kapila wrote:
> I think in that case we can call it as page info map or page state map, but
> I find retaining visibility map name in this case or for future (if we want to
> add another bit) as confusing. In-fact if you find "visibility and freeze
> map",
> as excessively long, then we can change it to "page info map" or "page state
> map" now as well.
Coming in late here, but the problem with "page info map" is that free
space is also page info (how much free space on each page), so "page
info map" isn't very descriptive. "page status" or "page state" might
make more sense, but even then, free space is a kind of page
status/state. What is happening is that broadening the name to cover
both visibility and freeze state also encompasses free space.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
+ Roman grave inscription +
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