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

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top press h – help,1show cpus, mmemory, tthreads, > column sorttop 09:01:04 up 8 days, 15:22, 2 users, load average: 1.71, 0.39, 0.12Tasks: 114 total, 1 running, 113 sleeping, 0 stopped, 0 zombieCpu0 : 5.3% us, 2.3% sy, 0.0% ni, 0.0% id, 92.0% wa, 0.0% hi, 0.3% siCpu1 : 0.3% us, 0.3% sy, 0.0% ni, 89.7% id, 9.7% wa, 0.0% hi, 0.0% siMem: 2053860k total, 2036840k used, 17020k free, 99556k buffersSwap: 2031608k total, 160k used, 2031448k free, 417720k cachedPID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND27830 oracle 16 0 1315m 1.2g 1.2g D 1.3 60.9 0:00.09 oracle27802 oracle 16 0 1315m 1.2g 1.2g D 1.0 61.0 0:00.10 oracle27811 oracle 16 0 1315m 1.2g 1.2g D 1.0 60.8 0:00.08 oracle27827 oracle 16 0 1315m 1.2g 1.2g D 1.0 61.0 0:00.11 oracle27805 oracle 17 0 1315m 1.2g 1.2g D 0.7 61.0 0:00.10 oracle27828 oracle 15 0 27584 6648 4620 S 0.3 0.3 0:00.17 tpcc.exe1 root 16 0 4744 580 480 S 0.0 0.0 0:00.50 init2 root RT 0 0 0 0 S 0.0 0.0 0:00.11 migration/03 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
vmstat(paging vs swapping)vmstat 10procs memory swap io system cpur b swpd free buff cache si so bi bo in cs us sy wa id2 0 0 5483524 200524 234576 0 0 54 63 152 513 0 3 0 960 2 0 1697840 200524 3931440 0 0 578 50482 1085 3994 1 22 14 633 0 0 7844 200524 5784109 0 0 59330 58946 3243 14430 7 32 18 42mstat 10procs memory swap io system cpur b swpd free buff cache si so bi bo in cs us sy wa id2 0 0 5483524 200524 234576 0 0 54 63 152 513 0 3 0 960 2 0 1662340 200524 234576 0 0 578 50482 1085 3994 1 22 14 633 0 235678 7384 200524 234576 18754 23745 193 58946 3243 14430 7 32 18 42
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: Red Hat Top ToolsCPU ToolsMemory To
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 and 54: proc/vmstat(RHEL4/RHEL5)cat /proc/v
Page 55 and 56: Alt Sysrq M - RHEL3/NUMASysRq : Sho
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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