Autovacuum not running properly

["Wetmore, Matthew (CTR)" <Matthew.Wetmore@xxxxxxxxxxxxxxxxxxx>]

-- Find current setting (this is at database level)

select * from pg_settings  where name in ('autovacuum','autovacuum_analyze_scale_factor','autovacuum_analyze_threshold','autovacuum_vacuum_scale_factor');

select current_setting('autovacuum_vacuum_scale_factor') as "analyze_scale_factor",current_setting('autovacuum_vacuum_threshold') as "vacuum_threshold";

select current_setting('autovacuum_analyze_scale_factor') as "analyze_scale_factor", current_setting('autovacuum_analyze_threshold') as "analyze_threshold";

-- Note: The smaller number = more aggressive = vacuum more frequence

-- Current:

-- autovacuum_analyze_scale_factor = 0.05    

-- autovacuum_vacuum_scale_factor = 0.1      

-- Fine Tune at table level = ALTER TABLE mytable SET (autovacuum_analyze_scale_factor = 0.02);

ALTER TABLE your_schema.your_table SET (autovacuum_enabled = true,autovacuum_analyze_scale_factor = 0.002,autovacuum_vacuum_scale_factor = 0.001);

-- Put it back to use global setting

ALTER TABLE your_schema.your_table RESET (autovacuum_enabled,autovacuum_analyze_scale_factor,autovacuum_vacuum_scale_factor);

 

From: Rajesh Kumar <rajeshkumar.dba09@xxxxxxxxx>
Sent: Sunday, August 27, 2023 4:09 AM
To: pgsql-admin@xxxxxxxxxxxxxxxxxxxx
Subject: [EXTERNAL] Autovacuum not running properly

 

Hi

 

Why Autovacuum is not running on specific tables while it works on other tables and how to resolve this.

 

And for some tables the last autovacuum done is 2days ago whereas most are till today.

 

 

How to analyze autovacuum and take action?