单选题
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？（）
The machine has too many users.
The machine has an I/O bottleneck.
The machine has a CPU bottleneck.
The machine has a memory bottleneck.
单选题
The bos.perf package is part of the base operating system. Performance Diagnostic tool， PDT， is a part of bos.perf. All of the following statements are true EXCEPT？（）
PDT attempts to identify performance problems automatically by collecting and integrating a wide range of performance， configuration and availability data.
PDT consists of three components， the collection component comprises a set of programs that periodically collect and record data， the retention component periodically reviews the collected data and discards data that is obsolete， and the reporting component periodically produces a diagnostic report from the current set of historical data.
PDT contains motif-based， AIX licensed programs that can easily access tools for system and network performance tuning， monitoring， and analysis.
PDT assesses the current state of a system and tracks changes in workload and performance. It attempts to identify incipient problems and suggest solutions before the problems become critical.
单选题
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？（）
The machine has too many users.
The machine has an I/O bottleneck.
The machine has a CPU bottleneck.
The machine has a memory bottleneck.
单选题
If percentage of RAM occupied by file pages falls below minperm， page replacement algorithm steals pages from （）
file pages only.
computational pages only.
either file or computational pages.
working segment only.
单选题
Which fastpath would be used to go directly to commit applied software？（）
smit commit
smit install
smit software
smit verify_install
单选题
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？（）
istat
topas
vmstat
filemon
单选题
Which of the following commands should be used to monitor the number of threads on the scheduler’s run queue for any given interval？（）
sar
pstat
iostat
filemon
单选题
Which of the following commands is run to adjust the number of free paging-space pages at which AIX begins killing processes？（）
schedtune
rmss
rmps
vmtune
单选题
Which of the following commands should be used to determine DNS name resolution performance？（）
iptrace
vmstat
hostname
ifconfig
单选题
A system administrator would like to reset statistics to initial values prior to collecting device statistics on ent0 interface. Which of the following commands should be run to accomplish this？（）
netstat -v ent0
chdev -l ent0 -a reset=true
entstat -r ent0
Ethernet interface values cannot be reset
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