We follow your advice, our goal is improve the quality of the solution
and we made it,however the total query execution time is higher.
Regards.
On 05/27/2015 04:36 PM, Tom Lane wrote:
> boix <boix(at)uclv(dot)cu> writes:
>> Hello, my partner and me are working with the goal of improve the GEQO's
>> performance, we tried with Ant Colony Optimization, but it does not
>> improve, actually we are trying with a new variant of Genetic Algorithm,
>> specifically Micro-GA. This algorithm finds a better solution than GEQO
>> in less time, however the total query execution time is higher. The
>> fitness is calculated by geqo_eval function. Does anybody know why this
>> happens?
> Well, for one thing, you can't just do this:
>
> + aux = aux1;
>
> without totally confusing all your subsequent steps.
>
> You'd want to copy the pointed-to data, likely, not the pointer.
>
> regards, tom lane