Mention dbsize in database sizing manual section.

doc/src/sgml/diskusage.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/diskusage.sgml,v 1.2 2002/06/21 19:06:44 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/diskusage.sgml,v 1.3 2002/06/21 19:17:40 momjian Exp $
 -->
 
 <chapter id="diskusage">
@@ -85,6 +85,11 @@ play-# ORDER BY relpages DESC;
 </programlisting>
   </para>
 
+  <para>
+   <application>dbsize</> loads functions into your database that allow
+   you to find the size of a table or database from inside
+   <application>psql</> without the need for <command>VACUUM/ANALYZE.</>
+  </para>
   <para>
    You can also use <application>oid2name</> to show disk usage. See
    <filename>README.oid2name</> for examples. It includes a script