tem.) The default is 12. For simpler queries it is usually best
        to use the regular, exhaustive-search planner, but for queries with
        many tables the exhaustive search takes too long, often
        longer than the penalty of executing a suboptimal plan.  Thus,
        a threshold on the size of the query is a convenient way to manage
        use of GEQO.
       </P
></DD
><DT
><A
NAME="GUC-GEQO-EFFORT"
></A
><TT
CLASS="VARNAME"
>geqo_effort</TT
>
      (<TT
CLASS="TYPE"
>integer</TT
>)</DT
><D