[HACKERS] An isolation test for SERIALIZABLE READ ONLY DEFERRABLE

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От Thomas Munro
Тема [HACKERS] An isolation test for SERIALIZABLE READ ONLY DEFERRABLE
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Msg-id CAEepm=2Byq6_vi2WuXQPVQJTsCXB2Xd7-Pgq+zQncPy1E_Kyfg@mail.gmail.com
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Ответы Re: [HACKERS] An isolation test for SERIALIZABLE READ ONLY DEFERRABLE  (Robert Haas <robertmhaas@gmail.com>)
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Hi hackers,

Here is a small patch to add a test exercising SERIALIZABLE READ ONLY
DEFERRABLE.  It shows a well known example of a serialisation anomaly
caused by a read-only transaction under REPEATABLE READ (snapshot
isolation), then shows the different ways that SERIALIZABLE and
SERIALIZABLE READ ONLY DEFERRABLE avoid the anomaly.

To be able to do this, the patch modifies the isolation tester so that
it recognises wait_event SafeSnapshot.

-- 
Thomas Munro
http://www.enterprisedb.com

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