uted by
  a server.
 </p><p>
  The module must be loaded by adding <code class="literal">pg_stat_statements</code> to
  <a class="xref" href="runtime-config-client.html#GUC-SHARED-PRELOAD-LIBRARIES">shared_preload_libraries</a> in
  <code class="filename">postgresql.conf</code>, because it requires additional shared memory.
  This means that a server restart is needed to add or remove the module.
  In addition, query identifier calculation must be enabled in order for the
  module to be active, which is don