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

单项选择题Thenicevalueis60inthepslisting.Whichcommandisusedtochangethistoavalueof20？（）

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Thenfsstat-ccommandshowszerobadxid，butretransandtimeoutsaresizeable，whatisthemostprobablecauseoftheproblem？（）

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Asystemhasusersdoinginteractiveworkwhilebackgroundjobsarerunning.Interactiveusersarerequestingthatsystemresponsetimebeimprovedforforegroundprocesses.Whichtuningparametersshouldbechangedtoaccomplishthis？（）

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

单项选择题Whichofthefollowingtoolsisusedtoreportthelocationoflogicalpartitionsofafilesystemonaphysicalvolume？（）

A. lsfs
B. iostat
C. lslv -p
D. lsvg -p

单项选择题WhichofthefollowingcommandswillresetNFSoptionstotheirdefaults？（）

A. nfso -d
B. nfso -c
C. startsrc -g nfs -d
D. startsrc -g nfs -r