Document pg_stat_replication, bump catversion since that was overlooked.

Itagaki Takahiro, edited by me.

doc/src/sgml/high-availability.sgml

@@ -865,6 +865,16 @@ primary_conninfo = 'host=192.168.1.50 port=5432 user=foo password=foopass'
      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>

doc/src/sgml/monitoring.sgml

@@ -294,6 +294,15 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
      </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),

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201101051
+#define CATALOG_VERSION_NO	201101071
 
 #endif