单项选择题

A. sarB. pstatC. iostatD. filemonWhichofthefollowingcom……

Which of the following commands displays the number of system calls per second that are being executed？（）

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

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热门试题

单项选择题Whichofthefollowingcommandsshouldbeusedtoshowhowmuchdataisreadfromorwrittentoaparticularlogicalvolume，giventhereareseveralotherlogicalvolumesonthesamedisk？（）

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

单项选择题WhichofthefollowingcommandsshouldbeusedtomonitordiskutilizationduringthetimeasystemisexperiencingadiskI Operformanceproblem？（）

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

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.