In this post, I am sharing a script for checking the status of AutoVacuum for all the PostgreSQL Tables.

If you don’t know about the MVCC architecture, you must visit the below article. Because of MVCC, we have to work on dead tuples which are generated by transactions in PostgreSQL.

What is Multi Version Concurrency Control (MVCC)

You can configure auto-vacuum on tables, but periodically you should check the status of it. Use below script for checking the status of Autovacuum.

PostgreSQL: Short note on VACUUM, VACUUM FULL and ANALYZE

PostgreSQL: Force Autovacuum for running Aggressive

SELECT 
    schemaname
    ,relname
    ,n_live_tup
    ,n_dead_tup
    ,last_autovacuum
FROM pg_stat_all_tables
ORDER BY n_dead_tup
    /(n_live_tup
      * current_setting('autovacuum_vacuum_scale_factor')::float8
      + current_setting('autovacuum_vacuum_threshold')::float8)
     DESC