多选题Which three statements correctly describe the features of the I/O calibration process?（）AOnly one I/O calibration process can run at a time.BIt automates the resource allocation for the Automated Maintenance Tasks.CIt improves the performance of the pe
题目
多选题
Which three statements correctly describe the features of the I/O calibration process?（）
A
Only one I/O calibration process can run at a time.
B
It automates the resource allocation for the Automated Maintenance Tasks.
C
It improves the performance of the performance-critical sessions while running.
D
It can be used to estimate the maximum number of I/Os and maximum latency time for the system.
E
The latency time is computed only when the TIMED_STATISTICS initialization parameter is set to TRUE.