I have saw recently that our YF server has decreased in performance although there was no major change in it. No additional data. The browsing thru menus is slower now. Just clicking on Views or Admin console takes much more time than before. Also very important, same action performed by admins and regular users its much much slower on regular user side. Do you have any idea what could cause this behavior? To have different feeling on performance from one machine to another and from one type of user to another?