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單項(xiàng)選擇題A TCP/IP application receives files from a remote machine. The application reads 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？（）

A. Increase the size of thewall
B. Increase the size of sb_max
C. Increase the size of tcp_recvspace
D. Increase the size of tcp_sendspace

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1.單項(xiàng)選擇題Which of the following commands should be used to determine whether a logical volume is contiguous across a disk？（）

A. lslv
B. lsfs
C. lspv
D. fileplace

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2.單項(xiàng)選擇題The rmss command provides the facility to run an application over a range of memory sizes and display the performance statistics. How is the simulated memory reset to the real memory of the machine？（）

A. rmss -c
B. rmss -p
C. rmss -r
D. rmss -s

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3.單項(xiàng)選擇題The system administrator has been getting complaints about slow performance from the server. After running vmstat the administrator notices average readings that show the free list （fre） approaching zero， as well as page-in （pi） and page-out （po） values to be high. Furthermore， the applications running are essential to daily business operations. Which of the following recommendations would provide the best overall improvement？（）

A. Increase physical disk
B. Increase number of CPU’s
C. Increase physical memory
D. Increase number of servers

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4.單項(xiàng)選擇題Which of the following commands is used to adjust the minperm and Maxperm values of real memory to 4% and 80%？（）

A. vmtune -N4 -M80
B. vmtune -f4 -F80
C. vmtune -l4 -L80
D. vmtune -p4 -P80

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5.單項(xiàng)選擇題An AIX system administrator wants to reset the level at which the SIGDANGER signal is sent to processes so appropriate actions can be taken when paging space is running low. Which of the following commands is used to reset the level？（）

A. vmtune -w
B. svmon -w
C. schedtune -w
D. vmstat -s

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