Why your Postgres table is bigger than its data
MVCC never updates a row in place. Every UPDATE leaves a dead tuple behind, and VACUUM is the only thing that cleans it up. Here is how to see the bloat and keep it in check.
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MVCC never updates a row in place. Every UPDATE leaves a dead tuple behind, and VACUUM is the only thing that cleans it up. Here is how to see the bloat and keep it in check.