Because of system performance problems， a system administrator ran the iostat command. The following iostat output is provided：

Which of the following issues can be derived from the output？（）

单项选择题A system administrator ran the iostat command because of system performance problems. The following iostat output is provided： Based on the output， which of the following is insufficient？（）

A.CPU
B.Memory
C.Paging space
D.Disk capacityX

单项选择题Asystemadministratorismonitoringasystemthathasrecentlyshownadecreaseinperformance.TheadministratorsuspectsthereisanoverloadoftrafficonasingleEthernetadapter.WhichofthefollowingcommandsisbesttoidentifyapossibleoverloadoftheEthernetadapter？（）

A.ping
B.iostat
C.netstat
D.ifconfig

单项选择题Asystemadministratorismonitoringasystemthathasrecentlyshownadecreaseinperformance.Theadministratorsuspectsthatthesystemmaybelowonmemoryandmaybepagingexcessively.Whichofthefollowingcommandsisbesttoidentifyapossiblepagingproblem？（）

A.iostat
B.netstat
C.ps
D.vmstat

单项选择题Whatcommandshouldasystemadministratorrunafterusinganeditortocreatethe etc tunables nextbootfile？（）

A.ksh -n nextboot
B.tunsave -a -f nextboot
C.tuncheck -r -f nextboot
D.diff $（vmtune） /etc/tunables/nextboot

单项选择题Whatstanzafiledoesasystemadministratorviewtodeterminewhatkernel-tuningparameterchangesweremadewhenthesystemwaslastbooted？（）

A./etc/rc.net
B./etc/tunables/tuning
C./etc/tunables/lastboot
D./usr/samples/kernel/nextboot