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單項選擇題

Which of the following commands should be used to show how much data is read from or written to a particular logical volume， given there are several other logical volumes on the same disk？（）

A. sar
B. lslv
C. iostat
D. filemon

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單項選擇題

Which of the following commands should be used to monitor disk utilization during the time a system is experiencing a disk I/O performance problem？（）

A. istat
B. topas
C. vmstat
D. filemon

單項選擇題

After running the vmstat command， which of the following would most likely cause the value in the blocked column to be unusually high？（）

A. Kernel thread
B. Too many users
C. Memory shortage
D. Network contention