单项选择题

A. N times the stripe unit sizeB. N times the VMM minfr……

In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）

A. N times the stripe unit size
B. N times the VMM minfree parameter
C. The same value as that of the VMM maxfree parameter
D. The same value as that of the VMM maxrndwrt parameter

<上一题目录下一题>

热门试题

单项选择题ATCP IPapplicationreceivesfilesfromaremotemachine.Theapplicationreads32kilobytesofdataatatimetothesocket，buthasnotissuedasystemcalltosetthewindowsize.Whichofthefollowingproceduresshouldbeperformedonthepersonalmachinetoincreasethethroughputoftheapplication？（）

A. Increase the size of thewall
B. Increase the size of sb_max
C. Increase the size of tcp_recvspace
D. Increase the size of tcp_sendspace

单项选择题Whichofthefollowingcommandsshouldbeusedtodeterminewhetheralogicalvolumeiscontiguousacrossadisk？（）

A. lslv
B. lsfs
C. lspv
D. fileplace

单项选择题Thermsscommandprovidesthefacilitytorunanapplicationoverarangeofmemorysizesanddisplaytheperformancestatistics.Howisthesimulatedmemoryresettotherealmemoryofthemachine？（）

A. rmss -c
B. rmss -p
C. rmss -r
D. rmss -s

单项选择题Thesystemadministratorhasbeengettingcomplaintsaboutslowperformancefromtheserver.Afterrunningvmstattheadministratornoticesaveragereadingsthatshowthefreelist（fre）approachingzero，aswellaspage-in（pi）andpage-out（po）valuestobehigh.Furthermore，theapplicationsrunningareessentialtodailybusinessoperations.Whichofthefollowingrecommendationswouldprovidethebestoverallimprovement？（）

A. Increase physical disk
B. Increase number of CPU’s
C. Increase physical memory
D. Increase number of servers

单项选择题WhichofthefollowingcommandsisusedtoadjusttheminpermandMaxpermvaluesofrealmemoryto4%and80%？（）

A. vmtune -N4 -M80
B. vmtune -f4 -F80
C. vmtune -l4 -L80
D. vmtune -p4 -P80