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

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От Peter Geoghegan
Тема Re: [HACKERS] [COMMITTERS] pgsql: Fix freezing of a dead HOT-updated tuple
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Msg-id CAH2-Wz=-eBQTEAfb_vnzMpYqH0EGEiohcYSmc=ykH_Y9fNywww@mail.gmail.com
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Ответ на Re: [HACKERS] [COMMITTERS] pgsql: Fix freezing of a dead HOT-updatedtuple  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
Ответы Re: [HACKERS] [COMMITTERS] pgsql: Fix freezing of a dead HOT-updatedtuple  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
Список pgsql-hackers
On Fri, Oct 6, 2017 at 6:18 AM, 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.

What problem persists? The original one (or, at least, the original
symptom of pruning HOT chains incorrectly)? If that's what you mean, I
wouldn't be so quick to assume that it's the freeze map.

--
Peter Geoghegan


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