RAL"
>ceil((max_connections + autovacuum_max_workers + 4) / 16)</TT
>.
    Lowering the number
    of allowed connections is a temporary workaround for failures,
    which are usually confusingly worded <SPAN
CLASS="QUOTE"
>"No space
    left on device"</SPAN
>, from the function <CODE
CLASS="FUNCTION"
>semget</CODE
>.
   </P
><P
>    In some cases it might also be necessary to increase
    <TT
CLASS="VARNAME"
>SEMMAP</TT
> to be at least on the order of
    <TT
CLASS="VARNAME"
>SEMMNS</TT
>. This parameter