Re: GEQO: ERX
От | Tobias Zahn |
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Тема | Re: GEQO: ERX |
Дата | |
Msg-id | 49FC6A92.7000302@arcor.de обсуждение исходный текст |
Ответ на | GEQO: ERX (Tobias Zahn <tobias-zahn@arcor.de>) |
Ответы |
Re: GEQO: ERX
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Список | pgsql-hackers |
Hello again, I didn't not get any response to my initial message below. Now I am wondering if nobody is into the optimizer or if my question was just too stupid. Could you please give me some clues? Your help would really be appreciated. Regards, Tobias > Hello, > I was digging through the optimizer code and have a question regarding > the edge recombination crossover (ERX) of the GEQO. It might be > completely stupid and therefore I apologize for this in advance. > > As far as I understand it, the idea of the ERX is the minimization of > edge failures. When reading in geqo_main.c and geqo_erx.c, it seams that > every iterative round (generation) it is checked by gimme_tour() if > there where any edge failures. When I understand the algorithm right, > there should be no edge failures. > Therefore I think about NOT checking for edge failures anymore, to save > some time. (If it just to make sure, it could be done only once in the > end.) Might that work or do I have some errors in my thoughts? > > Thanks in advance, > Tobias >
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