Re: Reviewing freeze map code

On Tue, May 3, 2016 at 6:48 AM, Andres Freund <andres@anarazel.de> wrote:
> Hi,
>
> The freeze map changes, besides being very important, seem to be one of
> the patches with a high risk profile in 9.6.  Robert had asked whether
> I'd take a look.  I thought it'd be a good idea to review that while
> running tests for
> http://www.postgresql.org/message-id/CAMkU=1w85Dqt766AUrCnyqCXfZ+rsk1witAc_=v5+Pce93Sftw@mail.gmail.com

Thank you for reviewing.

> For starters, I'm just going through the commits. It seems the relevant
> pieces are:
>
> a892234 Change the format of the VM fork to add a second bit per page.
> 77a1d1e Department of second thoughts: remove PD_ALL_FROZEN.
> fd31cd2 Don't vacuum all-frozen pages.
> 7087166 pg_upgrade: Convert old visibility map format to new format.
> ba0a198 Add pg_visibility contrib module.
>
> did I miss anything important?
>

That's all.

Regards,

--
Masahiko Sawada