X$Tables And Sga Scanner, DOAG2009
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Introduction to Oracle SGA structures, X$Tables and SGA-Scanners.
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X$Tables And Sga Scanner, DOAG2009
- 1. 19.11.2009 DOAG 2009 Page DOAG 2009 X$Tables and SGA-Scanner Dipl.-Inform. Frank Beutelschiess
- 8. SGA 19.11.2009 DOAG 2009 Page SGA - Architecture Redo Buffer Large Pool Dedicated Server Process Shared Server Process CKPT Data RedoLog Archive Control ARCn LGWR SMON PMON BufferCache Streams Pool Java Pool Shared Pool PGA PGA Dispatcher User User User User Dedicated Server Shared Server DBWn Instance Database Fixed Area
- 14. 19.11.2009 DOAG 2009 Page SGA - Parameters The type of parameter (fixed or dynamic), for example, is shown in the Enterprise Manager.
- 16. 19.11.2009 DOAG 2009 Page SGA – Granule Order Fixed Area Unused Buffer Cache Large Pool Java Pool Shared Pool Shared Pool Redo Buffer Increasing memory address Shared Pool Shared Pool Java Pool Streams Pool Shared Pool Shared Pool Large Pool Buffer Cache Buffer Cache Buffer Cache Buffer Cache Buffer Cache Buffer Cache Buffer Cache Buffer Cache Unused
- 30. 19.11.2009 DOAG 2009 Page X$KSPPI & X$KSPPSV select x.inst_id,y.ksppinm, decode(y.ksppity,1,'Boolean',2,'String',3,'Integer', 4,'ParameterFile',5,'Reserved',6,'BigInteger',y.ksppity), x.ksppstvl,x.ksppstdf, decode(bitand(y.ksppiflg/256,1),1,'TRUE','FALSE'), decode(bitand(y.ksppiflg/65536,3), 1,'IMMEDIATE',2,'DEFERRED',3,'IMMEDIATE','FALSE'), decode(bitand(x.ksppstvf,7),1,'MODIFIED',4,'SYSTEM_MOD','FALSE'), decode(bitand(x.ksppstvf,2),2,'TRUE','FALSE'), y.ksppdesc from X$KSPPI y, X$KSPPSV x where x.indx = y.indx and x.inst_id = y.inst_id order by 1,2
- 32. 19.11.2009 DOAG 2009 Page X$Tables - Terms Metalink Doc ID: Note:22241.1 Subject: List of X$ Tables and how the names are derived
- 43. 19.11.2009 DOAG 2009 Page SGA-Scanner - Configuration
- 46. 19.11.2009 DOAG 2009 Page SGA-Scanner - Implementation <Psapi>.EnumProcesses(*pProcessIds,…) <Kernel32>.OpenProcess(0x410,…,dwProcessId) <Psapi>.GetModuleBaseName(hProcess,…,lpBaseName,…) <Kernel32>.CloseHandle(hObject) <Kernel32>.ReadProcessMemory(hProcess, lpBaseAddress,lpBuffer,…) Oracle.exe? Liste fertig? <Kernel32>.CloseHandle(hObject) Yes Yes No No Start End
- 48. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (1/9) - List of all sessions (same as V$SESSION)
- 49. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (2/9) - Session 10 (SID 10) is newly added.
- 50. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (3/9) - Session 11 (SID 12) is newly added.
- 52. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (5/9) - Access to the table locked by the other session.
- 53. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (6/9) - Session 11 (SID 12) waits due to an enqueue.
- 54. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (7/9) - Lock is removed through a manual commit.
- 55. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (8/9) - Enqueue is broken.
- 56. 19.11.2009 DOAG 2009 Page SGA-Scanner – V$SESSION (9/9)
- 57. 19.11.2009 DOAG 2009 Page Thank you for your attention!