2.可能导致重复的延迟块清除操作(我们假设你了解delayed block cleanout是什么).
http://www.oracledatabase12g.com/archives/direct-read-impact-on-delayed-block-read.html
2.可能导致重复的延迟块清除操作(我们假设你了解delayed block cleanout是什么).
http://www.oracledatabase12g.com/archives/direct-read-impact-on-delayed-block-read.html