ext</TD
></TR
><TR
><TD
><TT
CLASS="VARNAME"
>SEMVMX</TT
></TD
><TD
>Maximum value of semaphore</TD
><TD
>at least 1000 (The default is often 32767; do not change unless necessary)</TD
></TR
></TBODY
></TABLE
></DIV
><P
>    <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> requires a few bytes of System V shared memory
    (typically 48 bytes, on 64-bit platforms) for each copy of the server.
    On most modern operating systems, this amount can easily be allocated.
    However, if you are running many copies 