Which two are true about instance recovery? (Choose two.)
A.正确答案CFIt is not possible if an archived log is missing.
B.It is performed automatically after the database is opened; however, blocks
Requiring recovery are not available until they are recovered.
C.Setting FAST_START_MTTR_TARGET to a lower value reduces instance
Recovery time by causing
Dirty buffers to be written to disk more frequently, thereby reducing the number
Of I/Os needed during instance recovery.
D.It is performed by the Recovery Writer (RVWR) background process.
E.Setting FAST_START_MTTR_TARGET to a higher value reduces instance
Recovery time by causing
The log writer to write more frquently, thereby reducing the number of I/Os
Needed during instance recovery. F.It is performed automatically while the database remains in MOUNT state.
Then the database is opened.
