| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Fujii Masao <masao(dot)fujii(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> |
| Subject: | Re: Freeze avoidance of very large table. |
| Date: | 2015-11-30 18:05:21 |
| Message-ID: | 20151130180521.GB4682@awork2.anarazel.de |
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| Lists: | pgsql-hackers |
On 2015-11-30 12:58:43 -0500, Bruce Momjian wrote:
> I would not bother mentioning this detail in the pg_upgrade manual page:
>
> + Since the format of visibility map has been changed in version 9.6,
> + <application>pg_upgrade</> creates and rewrite new <literal>'_vm'</literal>
> + file even if upgrading from 9.5 or before to 9.6 or later with link mode (-k).
Might be worthwhile to keep as that influences the runtime for link mode
when migrating <9.6 -> 9.6.
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