QUESTION NO: 455

Which three statements correctly describe the features of the I/O calibration process? (Choose three.)
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.

Answer: A,D,E

哪三种说法正确描述I/ O校准过程的特点？

A.在一个时刻只有一个I / O校准过程中可以运行。
D.它可以被用来评估系统的最大I / O数和最大延迟时间。
E.只有当定时统计初始化参数设置为真时才能计算该延迟时间。