在Oracle database 12c 中引入V$EVENT_NAME 视图新增字段DISPLAY_NAME，该字段用以更详细地解释对应的等待事件：  
DISPLAY_NAME VARCHAR2(64) A clearer and more descriptive name for the wait event that appears in the


本文转自maclean_007 51CTO博客，原文链接:http://blog.51cto.com/maclean/1278579