作者：maclean

SELECT alloc_type, alloc_size, num_objs_flushed, object_loaded FROM (SELECT ksmlrcom alloc_type, ksmlrsiz alloc_size, ksmlrnum num_objs_flushed, ksmlrhon object_loaded, RANK() OVER(ORDER BY ksmlrsiz DESC) AS order_ranking FROM x$ksmlru WHERE inst_id = USERENV(‘INSTANCE’) AND ksmlrsiz > 0) WHERE order_ranking <= 100 ORDER BY order_ranking/