To examine the Exhibit, press the Exhibit button. A user is compiling a C program.  A performance problem occurs and "vmstat 120 10" is run to determine the cause.  The vmstat output is provided in the exhibit.  Which of the following commands should be run to obtain more information about the problem?（）

单项选择题Whichofthefollowingkdbcommandsisusedtoobtainastacktracefromadump?（）

A. trb 
B. his 
C. f 
D. trace

单项选择题Asystemisexperiencingperformanceproblems.AftercheckingtheCPUusage,theproblemidentifiedisthatthesystemis CPUBound .WhichofthefollowingoutcomeswilldetermineifthereisapossibleCPUconstraint?（）

A. Low paging 
B. High paging 
C. Workload manager is not turned on 
D. A high run queue length 

单项选择题Ifasystemadministratorwantstoshowonlyadiskreportfordisk2,attwosecondintervals,whatisthecorrectcommandtorun?（）

A. iostat disk1 1 
B. iostat -d disk1 2 
C. iostat disk2 1 
D. iostat -d disk2 2

单项选择题WhatdoestheFREQcolumnshowwhenrunningthetprofoption?（）

A. Total amount of Ticks used by all users 
B. Total amount of Ticks used by all processes 
C. Total amount of Ticks used by a specific user 
D. Total amount of Ticks used by a specific type of process

单项选择题Whichofthefollowingcommandscanbeusedtodetermineifadiskdriveiscausingabottleneck?（）

A. vmstat 
B. fileplace 
C. iostat 
D. lvmstat