Re: Freeze avoidance of very large table. - Mailing list pgsql-hackers

From Andres Freund
Subject Re: Freeze avoidance of very large table.
Date
Msg-id 4C0361FB-447C-4624-B966-530AA0325A5B@anarazel.de
Whole thread Raw
In response to Re: Freeze avoidance of very large table.  (Simon Riggs <simon@2ndQuadrant.com>)
Responses Re: Freeze avoidance of very large table.  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
On October 8, 2015 7:35:24 PM GMT+02:00, Simon Riggs <simon@2ndQuadrant.com> wrote:

>The problem is we won't be able to tell the two formats apart, since
>they
>both are just lots of bits. So we won't be able to tell if the file is
>old
>format or new format, which could lead to loss of information that
>relates
>to visibility. 

I don't see the problem? I mean catversion will reliably tell you which format the vm is in?

We could additionally use the opportunity to as a metapage, but that seems like an independent thing.


Andres

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