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LetsGit.IT/Categories/PostgreSQL
PostgreSQLhard

How does MVCC work in PostgreSQL?

Tags
#mvcc#concurrency#postgresql
Back to categoryPractice quiz

Answer

MVCC (multi‑version concurrency control) keeps multiple versions of rows. Updates create new row versions with transaction IDs; readers see a consistent snapshot without blocking writers. Old versions are later cleaned up by VACUUM.

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