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LetsGit.IT/Categories/PostgreSQL
PostgreSQLeasy

Why do we need VACUUM (and autovacuum) in PostgreSQL?

Tags
#vacuum#autovacuum#bloat
Back to categoryPractice quiz

Answer

Because MVCC creates dead row versions, VACUUM cleans them up so space can be reused and query performance stays good. Autovacuum runs it automatically to prevent table bloat and transaction ID wraparound issues.

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