basis高级培训ADM315 Extended.ppt

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1、ADM315-AppendixAgendaLogonGroups32-BitmemoryallocationZero-AdministrationMemoryManagement2LogonGroupsLogongroupsaresetuptodistributetheloadacrossasystemInstancesareaddedtothelogongroupusingtransactionSMLGUserslogintoalogongroupinsteadofdirectlytoaserverandaredistributedtoth

2、ememberofthelogongroupwhichhasthelowestaveragedialogresponsetimeFormoreinformationrefertoSAPNote236173LogonGroupDetails432-BitMemoryAllocationVirtualAddressspaceofaWorkProcessis2*32=4GB2GBarerequiredbytheOperatingsystemthereforeonly2GBareavailablefortheSAPInstance64-bitoper

3、atingsystemsareonlyrestrictedbytheamountofphysicalmemoryavailable2GBofRAMmustbeallocatedamongthefollowingmemoryareaswhichareallocatedbytheworkprocessRollAreaPagingAreaUserportionofextendedmemoryUserportionofheapAlloftheSAPBuffers532-BitMemoryAllocationonWindowsInrelationtot

4、heoverallsizeofextendedmemorytherecommendationwouldbetoensurethatnomorethan2GBofmemoryisallocated.InrelationtoWindowsoperatingsystemtheinitialsizeofoverallextendedmemoryshouldbesetnogreaterthan2GBEm/initial_size_MBWindowsoperatingsystemsallowthattheoverallsizeofextendedmemo

5、rycangrowdynamicallyuptotheoverallamountofmemoryavaiablesetbyem/max_size_MB6Identificationof32-bitOperatingsystemIdentify32-bit&64-bitkernelsofdifferentOperatingsystemsAlsorefertoSAPNote146289Platform32-bit64-bitDEC-Alpha-288HP-UX272273/274RM600322323AIX320324SUN369370Linux

6、i1386387-LinuxIA64-388Linuxx86_64-390(SAPNote816097)LinuxforzSeries-389LinuxforIBMPOWER-391Windows560561System>Status>PlatformID7ZeroAdministrationMemoryManagementTosayitinsimplewords:“ThereisnoneedtospecifytheMemoryManagementparametersanditsvaluesintheprofiles–butofcoursey

7、oucan.ForastandardSAPsystemtheKernelDefaultparametersaresufficient.”ZeroAdministrationMemoryManagementisalsoavailableonplatformsotherthanWindowsbutmostcommonlyusedinaWindowsenvironmentTomakeuseofZAMMtheuserportionofextendedmemory(ztta/roll_extension)issetto2GBwhichdeactivat

8、edthisparameterTheuserportionofextendedmemoryisnowsetbyem/address_space_MB8Thankyo