  them to the server log.
        This parameter can only be set in the <TT
CLASS="FILENAME"
>postgresql.conf</TT
>
        file or on the server command line.
       </P
></DD
><DT
><A
NAME="GUC-TRACE-SORT"
></A
><TT
CLASS="VARNAME"
>trace_sort</TT
> (<TT
CLASS="TYPE"
>boolean</TT
>)</DT
><DD
><P
>        If on, emit information about resource usage during sort operations.
        This parameter is only available if the <TT
CLASS="SYMBOL"
>TRACE_SORT</TT
> macro
        was defined when <SPAN
CLASS="PRODUC