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
答案：a, d, e 相关问题: