Oracle RAC on RedHat Linux Best Practice guide and ... - OpenMPE

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Bigpages/Hugetlb •Bigpages (RH 2.1) are called Hugetlb in RH3 •Pages are not swapable. This means that the SGA still in memory. •Hugetlb is a backport from the kernel 2.6 •The pages are pre-allocated. that amount of physical memory can be used only through •hugetlbfs or shm allocated with SHM_HUGETLB. •Add “bigpages=xxxxMB” to the kernel boot line in grub.conf or lilo.conf (only with RH 2.1). •echo the values to '/proc/sys/vm/hugetlb_pool' or Update the '/etc/sysctl.conf'. The value are in MB, and it allocates several 2MB pages. •Values are viewable using '/proc/meminfo': •Hugepages_Total: 500 •Hugepages_Free: 500 •Hugepagesize: 2048K 60
IA-32: large memory pages (bigpages/hugetlb) • If the kernel is booted with “bigpages =4000MB” [oracle]$ cat /proc/meminfo total: used: free: shared: buffers: cached: Mem: 16553721856 4332068864 12221652992 196608 13639680 33484800 Swap: 2093129728 0 2093129728 MemTotal: MemFree: MemShared: Buffers: Cached: SwapCached: Active: Inact_dirty: Inact_clean: Inact_target: HighTotal: HighFree: LowTotal: LowFree: SwapTotal: 16165744 kB 11935208 kB 192 kB 13320 kB 32700 kB 0 kB 42364 kB 3848 kB 0 kB 4177920 kB 15532016 kB 11375900 kB 633728 kB 559308 kB 2044072 kB SwapFree: 2044072 kB BigPagesFree: 4096000 kB The 4000MB of memory are subtracted from the free system memory… … and put into a separate allocation area just for bigpages. 61
Page 1 and 2:
Oracle RAC
Page 3 and 4:
Hardware Pre-Requisites
Page 5 and 6:
Installation Flowchart for 10g <str
Page 7 and 8:
Overview of available products - Gr
Page 9 and 10: HP Server Linux certification Check
Page 11 and 12: Bios configuration Reliability is a
Page 13 and 14: Lun definition LUN definition shoul
Page 15 and 16: Redundant Storage Sets (RSS) • Su
Page 17 and 18: Performance Best Practices • Sing
Page 19 and 20: More Disks = More Performance Effec
Page 21 and 22: Choosing the good file system Redha
Page 23 and 24: Choosing the good file system Redha
Page 25 and 26: Installation Flowchart for OCFS Dow
Page 27 and 28: OCFS and RAC • M
Page 29 and 30: Install tips for OCFS • Ensure OC
Page 31 and 32: Performance ocfs vs raw
Page 33 and 34: OCFS 2 - What’s New ? • No magi
Page 35 and 36: ASM - Overview • ASM can be used
Page 37 and 38: Traditional vs ASM - Setup 1. Deter
Page 39 and 40: ASM - ASMlib API • The ASMLIB API
Page 41 and 42: The virtual file system • Permit
Page 43 and 44: Presentation of the /proc Mechanism
Page 45 and 46: Memory Handler
Page 47 and 48: Linux VM overview • SMP cache mec
Page 49 and 50: RedHat memory limit RHEL2.1 for ia3
Page 51 and 52: IA-32: memory map base address •
Page 53 and 54: Oracle VLM using s
Page 55 and 56: Oracle VLM using s
Page 57 and 58: Oracle using shmfs
Page 59: large memory pages (bigpages) • A
Page 63 and 64: Cache Mechanism Overview
Page 65 and 66: Native Posix Thread Linux • NPTL
Page 67 and 68: Kernel parameters • What paramete
Page 69 and 70: Kernel parameters - 2 Swap optimiza
Page 71 and 72: During installation... • Take car
Page 73 and 74: Oracle User - Envi
Page 75 and 76: Install ksh • The korn shell is m
Page 77 and 78: Requiered Packages Check the kernel
Page 79 and 80: SSH setting !!"#$%$ 79
Page 81 and 82: Storage Driver • Update the QLA d
Page 83 and 84: Operating system life cycle. • Ho
Page 85 and 86: Adjust Oracle Bloc
Page 87 and 88: Direct I/O Support • Direct I/O s
Page 89 and 90: Oracle9i R
Page 91 and 92: Oracle 10g <strong
Page 93 and 94: TNSNAMES Service Entry OE = (DESCRI
Page 95 and 96: Diagnostic utilities. • ps. • t
Page 97 and 98: Using Oracle Stats
Page 99 and 100: Packaging facility. • Why it can
Page 101 and 102: Anaconda overview. • What is anac
Page 103 and 104: Co-produced by:
Page 105 and 106: “This is a standard quote slide.
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Oracle RAC on RedHat Linux Best Practice guide and ... - OpenMPE

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