| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Sawada Masahiko <sawada(dot)mshk(at)gmail(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, 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: | 2015-07-08 13:40:03 |
| Message-ID: | CAA4eK1KzMjhN39GX1HA3nghr+TcOY23NNG0PSHHWEfuinV_81w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jul 7, 2015 at 5:37 PM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> On 6 July 2015 at 17:28, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>
> I think we need something for pg_upgrade to rewrite existing VMs.
>> Otherwise a large read only database would suddenly require a massive
>> revacuum after upgrade, which seems bad. That can wait for now until we all
>> agree this patch is sound.
>>
>
>
Since we need to rewrite the "vm" map, I think we should call the new map
> "vfm"
>
+1 for changing the name, as now map contains more than visibility
information.
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
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