Re: COPY FREEZE and PD_ALL_VISIBLE

On Wed, Oct 21, 2015 at 1:31 PM, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> wrote:
> It turns out it was pretty easy to set PD_ALL_VISIBLE on the new pages,
> since the code in hio that requests the relation to be extended already has
> info on the tuple's intended freeze status.
>
> Then you just need to refrain from clearing PD_ALL_VISIBLE when that tuple
> is actually written into the page. Not only because clearing would defeat
> the purpose, but also because it will cause an error--apparently the
> incipient page is not yet in a state where visibilitymap_clear is willing to
> deal with it.

Wouldn't it be better to instead fill the page with tuples first and
THEN set PD_ALL_VISIBLE?

--
Robert Haas
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