Which command series should be used to determine whether file paging or paging space paging is a problem when running a program from an idle system？（）

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 is most appropriate to draw about the machine？（）

Which of the following performance tools will work with optimized code and also provides source statement profiling？（）

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？（）

A TCP/IP application is transferring files from a personal machine to a remote machine.  The application writes 32 kilobytes of data at a time to the socket， but has not issued a system call to set the window size.  Which of the following procedures should be performed on the personal machine to increase the throughput of the application？（）

Which of the following commands should be used to monitor the number of threads on the scheduler’s run queue for any given interval？（）

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.  Using the vmstat output as shown in the exhibit， which of the following conclusions is most appropriate to draw about the I/O bottleneck？（）

After issuing the nfsstat -rs command， the null received column starts to grow. This indicates which of the following conditions？（）

Which of the following commands should be used to tune parameters of devices that are displayed with lsattr？（）

A system administrator would like to set a system to reboot after a crash.  What is the best way to do this？（）