users
        from interfering with shared memory or semaphores in different jails,
        and it allows the PostgreSQL IPC cleanup code to function properly.
        (In FreeBSD 6.0 and later the IPC cleanup code does not properly detect
        processes in other jails, preventing the running of postmasters on the
        same port in different jails.)
       </P
><P
>        <SPAN
CLASS="SYSTEMITEM"
>FreeBSD</SPAN
> versions before 4.0 work like
        <SPAN
CLASS="SYSTEMITEM"
>OpenBSD</SPAN
> (see bel