process status of the WAL receiver process, displayed using the
      <command>ps</> command (see <xref linkend="monitoring-ps"> for details).
     </para>
+    <para>
+     You can retrieve a list of WAL sender processes via the
+     <link linkend="monitoring-stats-views-table">
+     <literal>pg_stat_replication</></link> view. Large differences between
+     <function>pg_current_xlog_location</> and <literal>sent_location</> field
+     might indicate that the master server is under heavy load, while
+     differences between <literal>sent_location</> and 
+     <function>pg_last_xlog_receive_location</> on the standby might indicate
+     network delay, or that the the standby is under heavy load.
+    </para>
    </sect3>
 
   </sect2>
 
      </entry>
      </row>
 
+     <row>
+      <entry><structname>pg_stat_replication</><indexterm><primary>pg_stat_replication</primary></indexterm></entry>
+      <entry>One row per WAL sender process, showing process <acronym>ID</>,
+      user OID, user name, application name, client's address and port number,
+      time at which the server process began execution, and transaction log
+      location.
+     </entry>
+     </row>
+
      <row>
       <entry><structname>pg_stat_all_tables</><indexterm><primary>pg_stat_all_tables</primary></indexterm></entry>
       <entry>For each table in the current database (including TOAST tables),