http://blog.sina.com.cn/s/blog_62defbef0101opv0.html
http://blog.163.com/donfang_jianping/blog/static/136473951201421392635119/
http://blog.163.com/donfang_jianping/blog/static/1364739512012119104823260/
查看参数job_queue_processes是否设置正确。可用下面语句修改:
alter system set job_queue_processes = 10;
Repeat_Interva
http://www.linuxidc.com/Linux/2011-11/47666p3.htm