IBM(000-234)章节练习(2019.03.21)

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1 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？（）

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2 A system must be evaluated and tuned. In order to use a set of performance evaluation programs （e.g.， filemon， svmon， and tprof） which of the following packages should exist on the system in question？（）

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3 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？（）

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4 Using the schedtune output， memory is considered over-committed if：（）

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5 Which of the following commands should be used to reset the Virtual Memory Manager tuning parameters to their default values？（）

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6 The nfsstat -c command shows zero badxid， but retrans and timeouts are sizeable， what is the most probable cause of the problem？（）

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7 Which of the following phrases is TRUE regarding monitoring disk I/O with iostat？（）

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8 In an iostat report， which of the following options best describes the value of % tm_act？（）

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9 Using the schedtune output， memory is considered over-committed if：（）

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10 The nice value is 80 in the ps listing. Which command is used to change this to a value of 100？（）

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