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RHEL Kernel Performance Optimizatio
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Section 1 System Overview Proces
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Processor typesUniProcessorSymmet
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AMD64 System Numa Memory LayoutS1S2
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Physical Memory Supported/TestedRHE
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IncomesExpendituresDonkey owned 0.7
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Perzone page lists Active List
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Per NUMANode ResourcesMemory zone
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Virtual Address Space Maps 32bit
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Linux 32bit Address Space(Hugemem
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Memory Pressure32 bitDMA Normal H
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User Memory PressureAnonymous/pagec
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PageCache/Anonymous memory split(Co
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64bit Memory ReclamationRAMKernel
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Per Node/Zone Paging DynamicsUser A
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Buffered file system writeMemorycop
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Section 2 Analyzing System Perfo
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Red Hat Top ToolsCPU ToolsMemory To
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vmstat(paging vs swapping)vmstat 10
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iostat x of same IOzone EXT3 file
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free/numastat - memory allocation[r
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pstreeinit ─┬─/usr/bin/sealer
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The /proc filesystem /proc●meminf
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proc/slabinfoslabinfo version: 2
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32bit /proc//maps[root@dhcp8336
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proc/vmstat(RHEL4/RHEL5)cat /proc/v
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Alt Sysrq M - RHEL3/NUMASysRq : Sho
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Alt Sysrq M - RHEL4 & 5/NUMAFree pa
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Alt Sysrq W and PSysRq : Show CPUsC
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oprofile - opcontrol and opreport c
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Profiling Tools: SystemTapTechnolog
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New Tuning Tools w/ RH MRGMRG Tunin
- Page 67 and 68: Tuning how to set kernel paramet
- Page 69 and 70: OOM kills - swap space exhaustion(R
- Page 71 and 72: OOM kills - lowmem consumption(RHEL
- Page 73 and 74: Eliminating OOMkillsRHEL3●/proc/s
- Page 75 and 76: Performance Tuning - (RHEL3) /proc/
- Page 77 and 78: RHEL3 /proc/sys/vm/pagecachepagecac
- Page 79 and 80: Performance Tuning - (RHEL4 and RHE
- Page 81 and 82: RHEL4&5 /proc/sys/vm/min_free_kbyte
- Page 83 and 84: RHEL4&5 /proc/sys/vm/dirty_ratioAbs
- Page 85 and 86: dirty_ratio and dirty_background_ra
- Page 87 and 88: Pagecache TuningFilesystem/pagecach
- Page 89 and 90: (Hint)flushing the slabcache[tmp]#
- Page 91 and 92: x86●RHEL4 kernel selectionStandar
- Page 93 and 94: Problem 16GB x86 running SMP ker
- Page 95 and 96: Linux at 16cpus quadcore and b
- Page 97 and 98: Asynchronous I/O CharacteristicsR4
- Page 99 and 100: Disk IO tuning RHEL4/5RHEL4/5 -
- Page 101 and 102: Optimizing File System PerformanceU
- Page 103 and 104: McCalpin Streams Copy Bandwidth (1,
- Page 105 and 106: RHEL4&5 NUMAstat and NUMActlEXAMPLE
- Page 107 and 108: RHEL5.2 CPUspeed and performance:En
- Page 109 and 110: Effects of CPUspeed with RHEL5.2 Vi
- Page 111 and 112: EXT3, GFS, NFS Iozone w/ DirectIORH
- Page 113 and 114: Using HugeTLBfs w/ DatabasesRHEL4+5
- Page 115 and 116: Tuning Network Apps Messages/sec Di
- Page 117: RT Peformance of Network Apps Messa
- Page 121 and 122: Linux Performance Tuning References