Biggest databases postgres

Table and index sizes SELECT relname, pg_size_pretty(pg_total_relation_size(oid)) AS total, pg_size_pretty(pg_relation_size(oid)) AS table FROM pg_class WHERE relkind='r' ORDER BY pg_total_relation_size(oid) DESC LIMIT 20; Find unused indexes SELECT relname, indexrelname, idx_scan, pg_size_pretty(pg_relation_size(indexrelid)) AS size FROM pg_stat_user_indexes WHERE idx_scan=0 ORDER BY pg_relation_size(indexrelid) DESC; Check autovacuum status SELECT relname, n_dead_tup, last_autovacuum, last_autoanalyze FROM pg_stat_user_tables ORDER BY n_dead_tup DESC LIMIT 20; Reindex without locking REINDEX INDEX CONCURRENTLY <name>; -- note: cannot run inside a transaction block Create index online CREATE INDEX CONCURRENTLY idx_<name> ON <table>(col); -- monitor: SELECT * FROM pg_stat_progress_create_index;