Which of the following logical volume placement policies is likely to give the best performance in most cases， all other factors being equal？（）

单项选择题ThesystemadministratornoticesthatIPpacketsarenotgettingforwarded.ThesystemadministratorwantstouseanAIXmachineasaninternetworkrouteroverTCP IPnetworks.Whichofthefollowingcommandswillallowthischangeonthefly？（）

A. Some network attributes are runtime attributes that can be changed at any time. Others are loadtime attributes that must be set before the netinet kernel extension is loaded and be placed in the /etc/rc.net or /etc/rc.bsdnet file. This parameter cannot be done on the fly， since a reboot is required.
B. Add to the /etc/rc.net file or if a Berkelye-style network configuration， /etc/rc.bsdnet， and issue the command： no -a ipforwarding=1 to start ipforwarding immediately.
C. Add to the /etc/rc.net file or if a Berkeley-style network configuration， /etc/rc.bsdnet， and issue the command： no -o ipforwarding=0 to start ipforwarding immediately.
D. Add to the /etc/rc.net file or if a Berkeley-style network configuration， /etc/rc.bsdnet， and issue the command： no -o ipforwarding=1 to start ipforwarding immediately.

单项选择题Whichofthefollowingcommandsisruntoadjustthenumberoffreepaging-spacepagesatwhichAIXbeginskillingprocesses？（）

A. schedtune
B. rmss
C. rmps
D. vmtune

单项选择题Afterissuingthenfsstat-rscommand，thenullreceivedcolumnstartstogrow.Thisindicateswhichofthefollowingconditions？（）

A. Not enough NFS daemons running
B. Too many NFS daemons running
C. nfs_tcp_socketsize is too small
D. nfs_tcp_socketsize is too large

单项选择题Whichofthefollowingistrueaboutrmss？（）

A. rmss is a part of performance toolbox and stands for Reduced Memory System Simulator
B. rmss is a part of perfpmr and stands for Real Memory System Simulator
C. rmss is part of the standard bos.perf filesets and stands for Redundant Memory System Simulator
D. rmss is part of  WLM and stands for Real Memory System Simulator

单项选择题Asystemadministratorincreasesthembufpoolallocation，thenrunsvmstat.Itisnoticedthatthepagingratehasnotdecreased.Whatisthemosteffectiveoptiontomaintainthembufpoolanddecreasepaging？（）

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’.