單項(xiàng)選擇題When setting up schedules and enforcing scheduling of different types of workloads, which of the following are critical performance issues?()

A. Disk fragmentation
B. Performance results analysis
C. Capacity forecasting and planning
D. Resource contention and availability


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1.單項(xiàng)選擇題

To examine the Exhibit, press the Exhibit button. Using the output of "lslv" as shown in the exhibit, and given that logical volume lv00 is only located on hdisk0, which of the following conclusions is most appropriate to draw?()

A. Logical volume lv00 is fragmented on hdisk0
B. Logical volume lv00 size cannot be increased
C. Logical volume lv00 is used for paging space on hdisk0
D. Logical volume lv00 is the only logical volume on hdisk0

2.單項(xiàng)選擇題The nice value is 80 in the ps listing.  Which command is used to change this to a value of 100?()

A. renice 100 {PID}
B. renice -n 20 {PID}
C. renice --20 {PID}
D. renice -n -100 {PID}

3.單項(xiàng)選擇題Page replacements algorithm steals file pages only when percent of RAM occupied by filepages()

A. falls below minperm.
B. is between minperm and maxperm.
C. higher than maxperm.
D. lower than maxperm.

4.單項(xiàng)選擇題Which of the following procedures WILL NOT increase contiguous free space on a the filesystem /data1, located on /dev/lv01, that is heavily fragmented?()

A. Run defragfs -r /data1; defragfs /data1
B. Run defragfs -r /dev/lv01; defragfs /dev/lv01
C. Back up the filesystem by name, unmount the filesystem, recreate the filesystem by running mkfs /dev/lv01, and restoring the data from the backup.
D. Back up the filesystem by inode, unmount the filesystem, recreate the filesystem by running mkfs /dev/lv01, and restoring the data from the backup.

5.單項(xiàng)選擇題The system administrator notices that there is an I/O bottleneck on one of three disks in datavg volume group. This problem disk contains the JFS log, loglv00 and one filesystem, /mydatabase.  There are no other logical volumes on this disk.  Which of the following options would be the best solution?()

A. Increase the size of the JFS log logical volume so more transacations can be written to this log.
B. Create a second, additional JFS log and have the /mydatabase logical volume point to both JFS logs.
C. Migrate the JFS log device to another physical disk in the same volume group.
D. Only one JFS log device for each volume group can be used.  Use the migratepv command to move the JFS log device to an empty disk in another volume group.

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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?()

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Page replacements algorithm steals file pages only when percent of RAM occupied by filepages()

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Which of the following metrics provided by the iostat report is used to initially determine if a disk is I/O bound?()

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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?()

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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?()

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

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When setting up schedules and enforcing scheduling of different types of workloads, which of the following are critical performance issues?()

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