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Exam : IBM 000-234
Title : AIX 5l performance and systems tuning


1. To examine the Exhibits, press the Exhibit button. Using the command output as shown in the exhibits, which of the following conclusions is most appropriate to draw?
A. There is an I/O bottleneck.
B. The machine needs more memory.
C. The machine has a CPU bottleneck.
D. A paging space volume needs to be added to hdisk1 or hdisk2.
Answer: A

2. Which of the following metrics provided by the iostat report is used to initially determine if a system is I/O bound?
A. % idle
B. % sys
C. % user
D. % iowait
Answer: D

3. Which of the following commands should be used to show how much data is read from or written to a particular logical volume, given there are several other logical volumes on the same disk?
A. sar
B. lslv
C. iostat
D. filemon
Answer: D

4. Which of the following performance tools can be used to determine if a system is thrashing?
A. svmon and tprof
B. vmtune and schedtune
C. ps and schedtune
D. vmstat and topas
Answer: D

5. Which of the following commands is most useful in initially collecting data to determine a network performance problem?
A. ping
B. trace
C. ifconfig
D. lsattr
Answer: A

6. When monitoring a system using /usr/bin/vmstat with an interval, the metrics under page pi and page po represent which of the following phrases?
A. The pages to and from paging space per second
B. The page intervals and page operations per second
C. The page interrupts and page operations per second
D. The page segments transferred between pi and po devices per second
Answer: A

7. 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 should be drawn about the I/O bottleneck?
A. There is a file I/O bottleneck.
B. There are too many open files.
C. There appears to be a buffer shortage.
D. There is a paging space I/O bottleneck.
Answer: A

8. Which of the following tools should be used to report in-depth information about file fragments?
A. defragfs
B. istat
C. filemon
D. fileplace
Answer: D

9. Which of the following commands should be used to view and change the network filesystem tuning parameters available on the system?
A. no
B. nfso
C. vmtune
D. exportfs
Answer: B

10. Which of the following commands displays the number of system calls per second that are being executed?
A. sar
B. pstat
C. iostat
D. filemon
Answer: A

11. After running the vmstat command, which of the following would most likely cause the value in the blocked column to be unusually high?
A. Kernel thread
B. Too many users
C. Memory shortage
D. Network contention
Answer: A

12. Users complain an AIX server is running slow. Which of the following commands can be run to determine what is consuming systems resources?
A. tprof
B. lpstat
C. ps aux
D. entstat
Answer: C

13. Which of the following commands is used to display detailed ethernet statistics for ent0?
A. ifconfig ent0
B. entstat -d ent0
C. netstat -i
D. lscfg -vl ent0
Answer: B

14. Which of the following commands should be used to monitor disk utilization during the time a system is experiencing a disk I/O performance problem?
A. istat
B. topas
C. vmstat
D. filemon
Answer: B