This is an Exadata wait event that occurs when a session is reading information from V$CELL, V$CELL_THREAD_HISTORY and other assocociated views/tables in this same category. Solutions This is not a very common wait event so contact Oracle Support if there are excessive waits on this event in your system.
本文转自maclean_007 51CTO博客，原文链接:http://blog.51cto.com/maclean/1277898
