单项选择题
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
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相关考题
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单项选择题
Afterrunningthevmstatcommand，whichofthefollowingwouldmostlikelycausethevalueintheblockedcolumntobeunusuallyhigh？（）
A. Kernel thread
B. Too many users
C. Memory shortage
D. Network contention -
单项选择题
Whichofthefollowingcommandsismostusefulininitiallycollectingdatatodetermineanetworkperformanceproblem？（）
A. ping
B. trace
C. ifconfig
D. lsattr -
单项选择题
To examine the Exhibit， press the Exhibit button. While a user is compiling a C program， "vmstat 120 10" is run to determine the cause of a performance problem. Given the vmstat output as shown in the exhibit， which of the following conclusions should be drawn about the I/O bottleneck？（）
A. There is a file I/O bottleneck.
B. There are too many open files.
C. There appears to be a buffer shortage.
D. There is a paging space I/O bottleneck.
