Index: doc/src/sgml/runtime.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v
retrieving revision 1.366
diff -c -c -r1.366 runtime.sgml
*** doc/src/sgml/runtime.sgml	3 Apr 2006 23:35:02 -0000	1.366
--- doc/src/sgml/runtime.sgml	11 Apr 2006 19:23:27 -0000
***************
*** 764,769 ****
--- 764,781 ----
         </para>
  
         <para>
+         If running in FreeBSD jails by enabling <application>sysconf</>'s
+         <literal>security.jail.sysvipc_allowed</>, <application>postmaster</>s
+         running in different jails should be run by different operating system
+         users.  This improves security because it prevents one jail from
+         interfering with shared memory or semaphores in another, and it
+         allows the PostgreSQL IPC cleanup code to function properly.  
+         (In FreeBSD 6.0 and later the IPC cleanup code doesn't properly detect
+         processes in other jails, preventing the running of postmasters on the
+         same port in different jails.)
+        </para>
+ 
+        <para>
          <systemitem class="osname">FreeBSD</> versions before 4.0 work like 
          <systemitem class="osname">NetBSD</> and <systemitem class="osname">
          OpenBSD</> (see below).