ode class="literal">top</code> to track top-level statements (those issued
      directly by clients), <code class="literal">all</code> to also track nested statements
      (such as statements invoked within functions), or <code class="literal">none</code> to
      disable statement statistics collection.
      The default value is <code class="literal">top</code>.
      Only superusers can change this setting.
     </p></dd><dt><span class="term">
     <code class="varname">pg_stat_statements.track_utilit