单项选择题

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

A. schedtune -t
B. vmtune -R
C. schedtune -r
D. schedtune -D

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单项选择题

The nice value is 60 in the ps listing. Which command is used to change this to a value of 20？（）

A. renice -n -20 {PID}
B. renice -n 20 {PID}
C. renice -n -40 {PID}
D. renice -n 40 {PID}

单项选择题

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

A. Too many nfsd’s running
B. Client and server with different buffer sizes
C. Bridges， routers or gateways are receiving too many fragmentated packets
D. Too few nfsd’s running

单项选择题

A system has users doing interactive work while background jobs are running. Interactive users are requesting that system response time be improved for foreground processes. Which tuning parameters should be changed to accomplish this？（）

A. schedtune -h
B. schedtune -r
C. vmtune -f
D. schedtune -w