单选题A system administrator increases the mbuf pool allocation, then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging?()A  Increase the number of CPUs.B  Incre

题目
单选题
A system administrator increases the mbuf pool allocation, then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging?()
A

 Increase the number of CPUs.

B

 Increase the physical memory.

C

 Set the PSALLOC environment variable to ’late’.

D

 Set the PSALLOC environment variable to ’early’.

参考答案和解析
正确答案: A
解析: 暂无解析
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相似问题和答案

第1题:

An AIX 5L system has 2 active paging space devices - /dev/hd6 at 64MB in the rootvg and /dev/page01 at 256MB in the datavg. The system administrator has determined that only 192MB of active paging space is actually required and wants to reclaim some of the disk space for use by a new application. Which command should be used to reduce the size of /dev/page01?()

  • A、chps
  • B、rmps
  • C、chdev
  • D、swapoff

正确答案:A

第2题:

An Administrator notices a decrease in the performance of his site.  This is directly related to an increase in usage.  After further investigation he notices that users appear to be pooling up in the web server.  Which of the following would cause this to occur?()

  • A、The web Server ThreadsPerChild directive could be set too low.
  • B、The Web Container Thread Pool Minimum Size could be set too high.
  • C、The Web Container Thread Pool Maximum Size could be set too high.
  • D、The growable thread pool setting could be disabled for the Web Container.

正确答案:A,D

第3题:

You are making a sharp turn in a channel and using a buoy four points on the bow to gauge your rate of turn.If you observe the buoy moving aft relative to you,what should you do ________.

A.Increase the rate of turn

B.Decrease the rate of turn

C.Maintain a constant rate of turn

D.Decrease speed


正确答案:A

第4题:

You are the administrator of 20 Windows XP Professional computers. Each computer has one hard disk that has three volumes named C, D, and E. Each volume is 4 GB in size and has approximately 1 GB of available space. The total physical memory of each computer is 196 MB in size. The paging file on each computer is located on drive D. A user named Andrea reports that every day, one hour after she starts her Windows XP Professional computer, the computer appears to perform very slowly for 15 seconds. This always happens after she receives an error message stating that the system is low on virtual memory. You want to improve the performance of Andrea's computer. You do not want to install additional memory. What should you do?() 

  • A、Increase the initial size of the paging file.
  • B、Move the current paging file to the system drive.
  • C、Increase the Buffers setting in the Config.sys file. 
  • D、Enable the Adjust for best performance of: System cache memory usage option.

正确答案:A

第5题:

You find that the database performance degrades while you backup the PROD database using Recovery Manager (RMAN). The PROD database is running in shared server mode. The database instance is currently using 60% of total operating system memory. You suspect the shared pool fragmentation to be the reason. Which action would you consider to overcome the performance degradation?()

  • A、Configure Java Pool to cache the java objects.
  • B、Configure Streams Pool to enable parallel processing.
  • C、Increase Shared Pool size to cache more PL/SQL objects.
  • D、Increase Database Buffer Cache size to increase cache hits.
  • E、Configure Large Pool to be used by RMAN and shared server.
  • F、Increase the total System Global Area (SGA) size to increase memory hits.

正确答案:E

第6题:

On an IBM System Stoage DS8000 which of the following information pairs are mandatory to create a volume()

  • A、extent pool id and volume id
  • B、extent pool id and volume name
  • C、volume id and extent allocation method
  • D、volume name and extent allocation method

正确答案:A

第7题:

A system administrator is monitoring a system that has recently shown a decrease in performance.The administrator suspects that the system may be low on memory and may be paging excessively.Which of the following commands is best to identify a possible paging problem?()

  • A、iostat
  • B、netstat
  • C、ps
  • D、vmstat

正确答案:D

第8题:

A system administrator increases the mbuf pool allocation, then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging?()

  • A、 Increase the number of CPUs.
  • B、 Increase the physical memory.
  • C、 Set the PSALLOC environment variable to ’late’.
  • D、 Set the PSALLOC environment variable to ’early’.

正确答案:B

第9题:

You work as a database administrator for Certkiller .com. You find that the database performance degrades while you backup the Certkiller database using Recovery Manager (RMAN). The Certkiller database is running in shared server mode. The database instance is currently using 60% of total operating system memory. You suspect the shared pool fragmentation to be the reason.  Which action would you consider to overcome the performance degradation?()

  • A、Configure Java Pool to cache the java objects.
  • B、Configure Streams Pool to enable parallel processing.
  • C、Increase Shared Pool size to cache more PL/SQL objects.
  • D、Increase Database Buffer Cache size to increase cache hits.
  • E、Configure Large Pool to be used by RMAN and shared server.
  • F、Increase the total System Global Area (SGA) size to increase memory hits.

正确答案:E

第10题:

You are developing an application that connects to a Microsoft SQL Server database using the SqlConnection object. Your connection objects are being pooled. As the pool fills up, connection requests are queued. Some connection requests are rejected. You need to ensure that the application releases connections back to the pool as soon as possible. Also, you need to decrease the likelihood that connection requests will be rejected. Which three actions should you perform?()

  • A、Ensure that the Close method is called on each connection object after it has finished executing.
  • B、Ensure that each connection object is left open after it has finished executing.
  • C、Increase the Max Pool Size value inside the connection string.
  • D、Increase the Min Pool Size value inside the connection string.
  • E、Increase the Connection Lifetime value inside the connection string.
  • F、Increase the value of the ConnectionTimeout property of the SqlConnection object.

正确答案:A,C,F

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