单项选择题

A. istatB. topasC. vmstatD. filemonWhichofthefollowingc……

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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热门试题

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.

单项选择题WhichofthefollowingmetricsprovidedbytheiostatreportisusedtoinitiallydetermineifasystemisI Obound？（）

A. % idle
B. % sys
C. % user
D. % iowait

单项选择题Whichofthefollowingtoolsshouldbeusedtoreportin-depthinformationaboutfilefragments？（）

A. defragfs
B. istat
C. filemon
D. fileplace