（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
正确答案
答案解析
略
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