title: pg_total_relation_size is not as expected
body: <p>I have just cleared the table, but still pg_total_relation_size returns about 100 kB</p>
  
  <pre><code>DELETE FROM points;   
  SELECT pg_size_pretty(pg_total_relation_size('"public"."points"'));
  </code></pre>
  
  <p>Do I have refresh something?</p>