First, sorry for my engilsh!
Second, I've a problem with wp_options because is full, the size is about 144mb and my hosting limits the size to 100 mb.
I think that I find the problem, in phpmyadmin the wp_options has 10954 _transient_timeout_rss. I don´t know how can I delete this from wp_options. I think that delete the size go down of wp_options.