lementing
    the polling required for standby operation yourself. See the
    <A
HREF="pgstandby.html"
><SPAN
CLASS="APPLICATION"
>pg_standby</SPAN
></A
> module for a reference
    implementation of this.
   </P
><P
>    Note that in this mode, the server will apply WAL one file at a
    time, so if you use the standby server for queries (see Hot Standby),
    there is a delay between an action in the master and when the
    action becomes visible in the standby, corresponding the time it takes
    to fil