ng system tables (but still
        update the indexes when modifying the tables).  This is useful
        when recovering from damaged system indexes.
        This parameter cannot be changed after session start.
       </P
></DD
><DT
><A
NAME="GUC-POST-AUTH-DELAY"
></A
><TT
CLASS="VARNAME"
>post_auth_delay</TT
> (<TT
CLASS="TYPE"
>integer</TT
>)</DT
><DD
><P
>        If nonzero, a delay of this many seconds occurs when a new
        server process is started, after it conducts the
        authentication p