如何重置Exadata cell上的flash cache的内容？
可以通过以下命令实现：
cellcli
CellCLI: Release 11.2.3.1.1 - Production on Sun Sep 02 07:29:08 EDT 2012
Copyright (c) 2007, 2011, Oracle. All rights reserved.
Cell Efficiency Ratio: 527
CellCLI> LIST FLASHCACHECONTENT where objectnumber=17425 detail
cachedKeepSize: 8755838976
cachedSize: 8757706752
dbID: 2080757153
dbUniqueName: DBM
hitCount: 12940
hoursToExpiration: 21
missCount: 78488
objectNumber: 17425
tableSpaceNumber: 7
仅需要设置immediate cellsrv.cellsrv_flashcache(Reset,0,0,0) event，event的设置语法与普通的 RDBMS十分相似
CellCLI> alter cell events = "immediate cellsrv.cellsrv_flashcache(Reset,0,0,0)"
Cell dm01cel01 successfully altered
CellCLI> LIST FLASHCACHECONTENT where objectnumber=17425 detail
其他一些有用的命令：
将flashcache的状态转储到trace file中：
CellCLI> alter cell events = "immediate cellsrv.cellsrv_flashcache(dumpStats,0,0,12345)"
重置状态信息
CellCLI> alter cell events = "immediate cellsrv.cellsrv_flashcache(resetStats,0,0,0)"