PostgreSQL Table Bloat and Defragmentation: Autovacuum vs VACUUM vs VACUUM FULL
When rows are updated or deleted in PostgreSQL, the database does not immediately remove the old row versions from the table. Instead, PostgreSQL us…
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PostgreSQL index bloat: why VACUUM never shrinks an index, and how to measure it with avg_leaf_density
Short answer: If a PostgreSQL table's heap is healthy and its indexes are six times larger than the heap, autovacuum is not broken and never was. VA…