Which of the following phrases is TRUE regarding monitoring disk I/O with iostat？（）A、 The iostat can only be run as the root userB、 There could be zero percent I/O wait and still be an I/O bottleneckC、 Any I/O wait time displayed in output of "iostat" is an indication of severe I/O bottlenecks D、 Running "iostat" without any arguments/parameters is sufficient for resolving I/O bottlenecks
Which of the following phrases is TRUE regarding monitoring disk I/O with iostat？（）
- A、 The iostat can only be run as the root user
- B、 There could be zero percent I/O wait and still be an I/O bottleneck
- C、 Any I/O wait time displayed in output of "iostat" is an indication of severe I/O bottlenecks
- D、 Running "iostat" without any arguments/parameters is sufficient for resolving I/O bottlenecks
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