Vacuuming
Vacuuming and Autovacuuming
Vacuuming and Autovacuuming
Why Vaccum
Why Vaccum
To recover or reuse disk space occupied by updated or deleted rows.
To update data statistics used by the PostgreSQL query planner.
To update the visibility map, which speeds up index-only scans.
To protect against loss of very old data due to transaction ID wraparound or multixact ID wraparound.
https://www.postgresql.org/docs/11/routine-vacuuming.html
Check
Check
Is autovacuum running?
TODO
Bibliography
Bibliography