To examine the Exhibit， press the Exhibit button. While a developer is compiling a C program， "vmstat 120 10" is run to determine the cause of a performance problem. Using the vmstat output as shown in the exhibit， which of the following conclusions is most appropriate to draw about the machine？（）
A. The machine has too many users.
B. The machine has an I/O bottleneck.
C. The machine has a CPU bottleneck.
D. The machine has a memory bottleneck.
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A. tprof
B. topas
C. filemon
D. vmstat
A. The sys is high when po is high.
B. The po represents the number of page steals.
C. The low values usually indicate insufficient paging space.
D. The low values usually indicate sufficient memory for the load.
A. r is greater than 40
B. id is greater than 50
C. sum of id and wa equals 50
D. sum of us and sy equals 100
A. The amount of time taken to service an I/O interrupt
B. The percentage of time CPU（s） are waiting for page ins
C. The percentage of time the CPU9（s） are waiting on network
D. The percentage of time the CPU（s） are waiting for outstanding disk I/O requests
最新試題
Which of the following commands should be used to monitor the number of threads on the scheduler’s run queue for any given interval？（）
A system administrator increases the mbuf pool allocation， then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging？（）
When setting up schedules and enforcing scheduling of different types of workloads， which of the following are critical performance issues？（）
To examine the Exhibit， press the Exhibit button. Using the "ps -mo THREAD" output as shown in the exhibit， which of the following conclusions is most appropriate to draw？（）
Page replacements algorithm steals file pages only when percent of RAM occupied by filepages（）
Which of the following commands should be used to monitor the average number of threads in the scheduler’s run queue for any given interval？（）
Which of the following commands will only provide a snapshot of average memory usage for a process？（）
In order to determine how efficiently an application is reading and writing data， which of the following utilities will report read and write sizes on disk I/O requests？（）
Which tool is based on the AIX trace facility？（）
Which of the following commands is run to adjust the number of free paging-space pages at which AIX begins killing processes？（）