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LinuxOracle9iR2RedHatLinuxAdvancedServer2.1Oracle20026.....................................................................................................3LINUXORACLE.....................................................3.................................................................................4............................................................................464I/O...................................................................................4.....................................................................................................5I/O.........................................................................................5I/O.....................................................................................5......................................................6io_request_lock............................................7I/O...................................................................7.................................................................................14GBRAMSGA..........................................864GBRAM(VLM)...................10.....................................................................................1...................................................................................13..........................................................................................14PTE.......................................................................14Oracle9iR2RAC.............................................15......................................................................................15lsraid.................................................................................15........................................................16........................................................................................1664......................................................................................17............................................................................................................17LinuxOracle9iR2RedHatLinuxAdvancedServer2.12LinuxOracle9iR2RedHatLinuxAdvancedServer2.1LinuxITLinuxOracle——LinuxOracleRedHatRedHatLinuxRedHat“AdvancedServer”OracleRedHatLinuxAdvancedServer2.1Oracle9iR2LINUXORACLELinuxUNIXLinuxOracle9iR2UNIXSolarisHPUXTru64OracleLinuxOracleUNIXLinuxOracle9iR2RedHatLinuxAdvancedServer2.13WindowsLinuxOracle9iR2UNIXLinuxOracleWindows32IntelPentiumSGAPGA3GB3GB648TBOracle9iR2RedHatLinuxAdvancedServer2.1Linux“ext2”OracleI/ORAC64I/OLinux64I/O32IntelPentiumOracle9iR2642GB4GB(64K)4(16KB)Oracle64GB16KB4petabyteLinuxOracle9iR2RedHatLinuxAdvancedServer2.14OracleLinuxRedHatLinuxAdvancedServer2.1Oracle9iR2LinuxOracleIntel32(IA-32)Itanium2Intel64(IA-64)Oracle9iR2RedHatLinuxAdvancedServerI/OAdvancedServerOracleI/OI/Oi/oIOI/OI/OI/OAdvancedServerI/OI/OI/OI/OI/OOracleI/OI/OI/OLinuxOracle9iR2RedHatLinuxAdvancedServer2.15Oracle9iR2I/OLinuxRedHatLinuxAdvancedServer2.1Oracle9iR2I/ORedHatLinuxAdvancedServer2.1Oracle9iR2OracleRedhat1)cdto$ORACLE_HOME/rdbms/liba)make-fins_rdbms.mkasync_onb)make-fins_rdbms.mkioracle2)I/Ocdto$ORACLE_HOME/rdbms/liba)make-fins_rdbms.mkasync_offb)make-fins_rdbms.mkioracle3)init.oraa)'disk_asynch_io=true'true4)init.oraa)OracleI/Oext2b)'disk_asynch_io=true'truec)'filesystemio_options=asynch'IA-32gigabyte(GB)1GBLinuxRAMI/OI/OI/OLinuxOracle9iR2RedHatLinuxAdvancedServer2.16RedHatLinuxAdvancedServer2.1io_request_lockLinuxI/OI/OI/ORedHatLinuxAdvancedServer2.1I/OSMPI/OI/ODellHP/CompaqEMCI/Oio_request_lock(VM)Oracle(SGA)SGAOracleSGASGAOSVMLinuxOracleVMRedHatLinuxAdvancedServer2.1LinuxOracleOracleLinuxOracle9iR2RedHatLinuxAdvancedServer2.17VM4GBRAMSGA4GBRAMLinuxOracle1.7GBSGARedHatLinuxAdvancedServer2.1/procLinuxOracleSGALinuxOracleRedHatLinuxAdvancedServer2.1“smp”4GBRAM“enterprise”64GBRAMRAM4GBRAM“smp”CPUOracleOracleSGAOracle0x50000000LinuxOracleAdvancedServer2.1OracleOracleSGA•Oracle•cd$ORACLE_HOME/lib•cp-alibserver9.alibserver9.a.org•cd$ORACLE_HOME/bin•cp-aoracleoracle.org•cd$ORACLE_HOME/rdbms/lib•genksms-s0x15000000ksms.sSGA0x15000000LinuxOracle9iR2RedHatLinuxAdvancedServer2.18•make-fins_rdbms.mkksms.oSGA•make-fins_rdbms.mkioracleLinuxOracleSGAAdvancedServer2.1/procOracleOracle•Oracle•Oracle•su•OracleidOracleecho$$•Oracle0x10000000echo268435456/proc/pid/mapped_basepidid•shmmaxOracleSGAecho3000000000/proc/sys/kernel/shmmax•OracleOracleSGAOracledb_cache_sizedb_block_buffersinit.oraOracleLinuxOracle9iR2RedHatLinuxAdvancedServer2.1964GBRAM(VLM)AdvancedServer2.1Oracle32Intel4GBOracleVLMRedHatLinuxAdvancedServer2.1Oracle9iR2RAMSGA62GBSGAVLMSGAVLMLinuxinit.ora4GBRAM“enterprise”CPU4GBRAMRAMLinuxOS/dev/shmmount-tshmshmfs-onr_blocks=2097152/dev/shm/dev/shm8GBshmfsnr_block4096Oracle/dev/shmOracleinit.orainit.ora'use_indirect_data_buffers=true'•db_cache_size•db_2k_cache_size•db_4k_cache_size•db_8k_cache_sizeLinuxOracle9iR2RedHatLinuxAdvancedServer2.110•db_16k_cache_size•db_32k_cache_sizedb_block_buffersOracle9iR2VLMinit.ora'use_indirect_data_buffers=true'LinuxOracleSGAOracle512MBOracleVLM_WIN