the problem its that... thats weird things happend if i disable things.
if i disable all using the config.php method, the forum back to fast.
the same when i disable then re-enable product on admin panel, the forum is run fast. then the next day, the same thing will happend again.
i need to disable and enable whatever plugin. Its a weird solution.
if i did not do that, the forum crawl like a snail