D
><P
>        Controls the trade-off between planning time and query plan
        quality in GEQO. This variable must be an integer in the
        range from 1 to 10. The default value is five. Larger values
        increase the time spent doing query planning, but also
        increase the likelihood that an efficient query plan will be
        chosen.
       </P
><P
>        <TT
CLASS="VARNAME"
>geqo_effort</TT
> doesn't actually do anything
        directly; it is only used to compute the default values