| From: | Sawada Masahiko <sawada(dot)mshk(at)gmail(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | 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: | 2015-07-03 08:25:34 |
| Message-ID: | CAD21AoCH7xzAS_fOEe7Q35edcX9Hbbtx5gi_4JMbe6nYdqwVeA@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Fri, Jul 3, 2015 at 1:23 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> On 2 July 2015 at 16:30, Sawada Masahiko <sawada(dot)mshk(at)gmail(dot)com> wrote:
>
>>
>> Also, the flags of each heap page header might be set PD_ALL_FROZEN,
>> as well as all-visible
>
>
> Is it possible to have VM bits set to frozen but not visible?
>
> The description makes those two states sound independent of each other.
>
> Are they? Or not? Do we test for an impossible state?
>
It's impossible to have VM bits set to frozen but not visible.
These bit are controlled independently. But eventually, when
all-frozen bit is set, all-visible is also set.
Regards,
--
Sawada Masahiko
| From | Date | Subject | |
|---|---|---|---|
| Next Message | David Rowley | 2015-07-03 08:49:44 | Re: PATCH:do not set Win32 server-side socket buffer size on windows 2012 |
| Previous Message | Heikki Linnakangas | 2015-07-03 08:19:50 | Re: Fix pgbench --progress report under (very) low rate |