Re: Potential G2-item cycles under serializable isolation

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От Peter Geoghegan
Тема Re: Potential G2-item cycles under serializable isolation
Дата
Msg-id CAH2-Wzk=-gRrZP4mvsFeFN8VQDw2WNdS8AnJG8eX020Q7XSmMQ@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Potential G2-item cycles under serializable isolation  (Peter Geoghegan <pg@bowt.ie>)
Ответы Re: Potential G2-item cycles under serializable isolation  (Kyle Kingsbury <aphyr@jepsen.io>)
Re: Potential G2-item cycles under serializable isolation  (Thomas Munro <thomas.munro@gmail.com>)
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Дерево обсуждения 
On Mon, Jun 8, 2020 at 7:30 PM Peter Geoghegan <pg@bowt.ie> wrote:
> I'll try to write an isolationtester test tomorrow.

Attached is v3, which has an isolationtester test.

It also fixes an assertion failure that could happen in rare cases,
which was reported to me privately by Thomas. We now explicitly don't
go ahead with an XID when it precedes TransactionXmin.

I overstated the significance of the fact that the transaction aborts
in the case that we looked at. That isn't an essential part of the
anomaly. See the isolation test.

-- 
Peter Geoghegan
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