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23 строки
597 B
Plaintext
23 строки
597 B
Plaintext
https://postgrespro.ru/docs/postgresql/16/transaction-iso
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mainly relevant to lock-based DB impls (while PG is an MVCC-one)
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read uncommitted
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not supported by PG
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read committed (default)
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(the same 2 selects can bring distinct results)
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repeatable read
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serializable
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(as if all transactions are chained one-after-another)
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show default_transaction_isolation;
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default_transaction_isolation
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-----------------------------
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read committed
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at distinct level we use distinct snapshoting strategies ...
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2024
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https://habr.com/ru/articles/845522/
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https://habr.com/ru/articles/815323/
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