Document that statement_timeout is not recommended in postgresql.conf

because it affects all sessions, including autovacuum.

doc/src/sgml/config.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.170 2008/03/10 12:55:13 mha Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.171 2008/03/11 15:39:23 momjian Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -3877,6 +3877,12 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
         logged.  A value of zero (the default) turns off the 
         limitation.
        </para>
+
+       <para>
+        Setting <varname>statement_timeout</> in
+        <filename>postgresql.conf</> is not recommended because it
+        affects all sessions, including autovacuum.
+       </para>
       </listitem>
      </varlistentry>