RHEL Kernel Performance Optimization, Characterization ... - Red Hat

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Alt Sysrq M – <strong>RHEL</strong>3SysRq : Show MemoryMeminfo:Zone:DMA freepages: 2929 min: 0 low: 0 high: 0Zone:Normal freepages: 1941 min: 510 low: 2235 high: 3225Zone:HighMem freepages: 0 min: 0 low: 0 high: 0Free pages: 4870 ( 0 HighMem)( Active: 72404/13523, inactive_laundry: 2429, inactive_clean: 1730, free: 4870 )aa:0 ac:0 id:0 il:0 ic:0 fr:2929aa:46140 ac:26264 id:13523 il:2429 ic:1730 fr:1941aa:0 ac:0 id:0 il:0 ic:0 fr:01*4kB 4*8kB 2*16kB 2*32kB 1*64kB 2*128kB 2*256kB 1*512kB 0*1024kB 1*2048kB 2*4096kB = 11716kB)1255*4kB 89*8kB 5*16kB 1*32kB 0*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 7764kB)Swap cache: add 958119, delete 918749, find 4611302/5276354, race 0+127234 pages of slabcache244 pages of kernel stacks1303 lowmem pagetables, 0 highmem pagetables0 bounce buffer pages, 0 are on the emergency listFree swap: 598960kB130933 pages of RAM0 pages of HIGHMEM3497 reserved pages34028 pages shared39370 pages swap cached
Alt Sysrq M – <strong>RHEL</strong>3/NUMASysRq : Show MemoryMeminfo:Zone:DMA freepages: 0 min: 0 low: 0 high: 0Zone:Normal freepages:369423 min: 1022 low: 6909 high: 9980Zone:HighMem freepages: 0 min: 0 low: 0 high: 0Zone:DMA freepages: 2557 min: 0 low: 0 high: 0Zone:Normal freepages:494164 min: 1278 low: 9149 high: 13212Zone:HighMem freepages: 0 min: 0 low: 0 high: 0Free pages: 866144 ( 0 HighMem)( Active: 9690/714, inactive_laundry: 764, inactive_clean: 35, free: 866144 )aa:0 ac:0 id:0 il:0 ic:0 fr:0aa:746 ac:2811 id:188 il:220 ic:0 fr:369423aa:0 ac:0 id:0 il:0 ic:0 fr:0aa:0 ac:0 id:0 il:0 ic:0 fr:2557aa:1719 ac:4414 id:526 il:544 ic:35 fr:494164aa:0 ac:0 id:0 il:0 ic:0 fr:02497*4kB 1575*8kB 902*16kB 515*32kB 305*64kB 166*128kB 96*256kB 56*512kB 39* 1024kB 30*2048kB 300*4096kB = 1477692kB)Swap cache: add 288168, delete 285993, find 726/2075, race 0+04059 pages of slabcache146 pages of kernel stacks388 lowmem pagetables, 638 highmem pagetablesFree swap: 1947848kB917496 pages of RAM869386 free pages30921 reserved pages21927 pages shared2175 pages swap cachedBuffer memory: 9752kBCache memory: 34192kBCLEAN: 696 buffers, 2772 kbyte, 51 used (last=696), 0 locked, 0 dirty 0 de layDIRTY: 4 buffers, 16 kbyte, 4 used (last=4), 0 locked, 3 dirty 0 delay
Page 1 and 2:
RHEL Kernel Performance Optimizatio
Page 3 and 4: Section 1 System Overview Proces
Page 5 and 6: Processor typesUniProcessorSymmet
Page 7 and 8: AMD64 System Numa Memory LayoutS1S2
Page 9: Physical Memory Supported/TestedRHE
Page 13 and 14: IncomesExpendituresDonkey owned 0.7
Page 15 and 16: Perzone page lists Active List
Page 17 and 18: Per NUMANode ResourcesMemory zone
Page 19 and 20: Virtual Address Space Maps 32bit
Page 21 and 22: Linux 32bit Address Space(Hugemem
Page 23 and 24: Memory Pressure32 bitDMA Normal H
Page 25 and 26: User Memory PressureAnonymous/pagec
Page 27 and 28: PageCache/Anonymous memory split(Co
Page 29 and 30: 64bit Memory ReclamationRAMKernel
Page 31 and 32: Per Node/Zone Paging DynamicsUser A
Page 33 and 34: Buffered file system writeMemorycop
Page 35 and 36: Section 2 Analyzing System Perfo
Page 37 and 38: Red Hat Top ToolsCPU ToolsMemory To
Page 39 and 40: vmstat(paging vs swapping)vmstat 10
Page 41 and 42: iostat x of same IOzone EXT3 file
Page 43 and 44: free/numastat - memory allocation[r
Page 45 and 46: pstreeinit ─┬─/usr/bin/sealer
Page 47 and 48: The /proc filesystem /proc●meminf
Page 49 and 50: proc/slabinfoslabinfo version: 2
Page 51 and 52: 32bit /proc//maps[root@dhcp8336
Page 53: proc/vmstat(RHEL4/RHEL5)cat /proc/v
Page 57 and 58: Alt Sysrq M - RHEL4 & 5/NUMAFree pa
Page 59 and 60: Alt Sysrq W and PSysRq : Show CPUsC
Page 61 and 62: oprofile - opcontrol and opreport c
Page 63 and 64: Profiling Tools: SystemTapTechnolog
Page 65 and 66: 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 and 118:
RT Peformance of Network Apps Messa
Page 119 and 120:
General Performance Tuning Guidelin
Page 121 and 122:
Linux Performance Tuning References
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RHEL Kernel Performance Optimization, Characterization ... - Red Hat

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