title: Why the table pg_stat_user_tables is blank?
body: <p>I am new to postgres.</p>
  
  <p>I am checking the stats in table pg_stat_user_tables but i didn't get any results. It says 0 rows found.</p>
  
  <p>Any idea how this table get updated?
  Is there any parameter to enable the stats ?</p>
  
  <p>Thanks</p>