Re: [HACKERS] [COMMITTERS] pgsql: Fix freezing of a dead HOT-updated tuple

On Fri, Oct 6, 2017 at 10:18 PM, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> Wood, Dan wrote:
>> Yes, I’ve been testing 9.6.  I’ll try Alvaro’s patch today.
>>
>> I would prefer to focus on either latest 9X or 11dev.
>
> I tested my patch on 9.4 and 9.5 today and it seems to close the problem
> (with the patch, I waited 10x as many iterations as it took for the
> problem to occur ~10 times without the patch), but I can reproduce a
> problem in 9.6 with my patch installed.  There must be something new in
> 9.6 that is causing the problem to reappear.

The freeze visibility map has been introduced in 9.6... There could be
interactions on this side.
--
Michael


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