Expert Oracle Exadata - Parent Directory

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CHAPTER 10 EXADATA WAIT EVENTSEvent Waits
CHAPTER 10 EXADATA WAIT EVENTSTABLE ACCESS BY LOCAL INDEX ROWID 1428TABLE ACCESS STORAGE FULL 5046TABLE ACCESS STORAGE SAMPLE 916ParametersThe cell multiblock physical read event also provides more information than most cell events. Theparameters in the following list allow you to tell which object was read and identifies the disk and cellwhere the blocks were stored. The total bytes passed should be a multiple of the block size.P1 - Cell hash numberP2 - Disk hash numberP3 - Total bytes passed during read operationobj# - The object number of the object being readcell list of blocks physical readThis event is a replacement for the db file parallel read event. It appears that the developers took theopportunity to rename some of the events that are related to disk operations, and this is one of thoseevents. The new name is actually much more descriptive than the previous name, since the wait eventhas nothing whatsoever to do with parallel query or parallel DML.Event MeaningThis event is used for a multi-block read of noncontiguous blocks. This is more effective with async I/O,which is enabled on <strong>Exadata</strong> by default. This event can be provoked by several operations. The mostcommon are Index Range Scans, Index Unique Scans and Table Access By Index Rowid. The mostcommon reason for the event is index pre-fetching. Here is the output of a query that shows theoperations that resulted in this wait event on an active production system:SYS@EXDB1> select event, operation, count(*) from (2 select sql_id, event, sql_plan_operation||' '||sql_plan_options operation3 from DBA_HIST_ACTIVE_SESS_HISTORY4 where event like 'cell list%')5 group by operation, event6 order by 1,2,37 /EVENT OPERATION COUNT(*)----------------------------------- ---------------------------------------- --------cell list of blocks physical read 2INDEX RANGE SCAN 156INDEX STORAGE FAST FULL SCAN 1INDEX UNIQUE SCAN 66TABLE ACCESS BY GLOBAL INDEX ROWID 90TABLE ACCESS BY INDEX ROWID 1273TABLE ACCESS BY LOCAL INDEX ROWID 2593331
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For your convenience Apress has pla
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IntroductionThank you for purchasin
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INTRODUCTIONwere implementing Exada
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CHAPTER 1 WHAT IS EXADATA?end of t
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CHAPTER 1 WHAT IS EXADATA? Kevin S
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CHAPTER 1 WHAT IS EXADATA?Limited
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CHAPTER 1 WHAT IS EXADATA? Note: H
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CHAPTER 1 WHAT IS EXADATA?StorageS
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CHAPTER 1 WHAT IS EXADATA?Adapters
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CHAPTER 1 WHAT IS EXADATA? Kevin S
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CHAPTER 1 WHAT IS EXADATA?Notice t
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CHAPTER 1 WHAT IS EXADATA?Software
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CHAPTER 1 WHAT IS EXADATA?Single I
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C H A P T E R 2Offloading / Smart S
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CHAPTER 2 OFFLOADING / SMART SCANR
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CHAPTER 2 OFFLOADING / SMART SCAN3
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CHAPTER 2 OFFLOADING / SMART SCANm
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CHAPTER 2 OFFLOADING / SMART SCANo
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CHAPTER 2 OFFLOADING / SMART SCANS
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CHAPTER 2 OFFLOADING / SMART SCANX
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CHAPTER 2 OFFLOADING / SMART SCANC
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CHAPTER 2 OFFLOADING / SMART SCANe
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CHAPTER 2 OFFLOADING / SMART SCANa
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CHAPTER 2 OFFLOADING / SMART SCANs
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CHAPTER 2 OFFLOADING / SMART SCAN-
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CHAPTER 2 OFFLOADING / SMART SCANF
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C H A P T E R 3Hybrid Columnar Comp
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CHAPTER 3 HYBRID COLUMNAR COMPRESS
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C H A P T E R 4Storage IndexesStora
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CHAPTER 4 STORAGE INDEXESMonitorin
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CHAPTER 4 STORAGE INDEXESVersion:
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CHAPTER 4 STORAGE INDEXES• For e
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CHAPTER 4 STORAGE INDEXES• _cell
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CHAPTER 4 STORAGE INDEXESSYS@EXDB1
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CHAPTER 4 STORAGE INDEXESpositives
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CHAPTER 4 STORAGE INDEXESIncorrect
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CHAPTER 4 STORAGE INDEXES---------
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CHAPTER 4 STORAGE INDEXES1 row sel
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C H A P T E R 5Exadata Smart Flash
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CHAPTER 5 EXADATA SMART FLASH CACH
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C H A P T E R 6Exadata Parallel Ope
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CHAPTER 6 MAKING PCBSParameter Def
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CHAPTER 6 MAKING PCBSTable 6-2. Hi
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CHAPTER 6 MAKING PCBSSo as you can
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CHAPTER 6 MAKING PCBS-- switch to
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CHAPTER 6 MAKING PCBSThe Old WayBe
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CHAPTER 6 MAKING PCBS((4 × CPU_co
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CHAPTER 6 MAKING PCBSSYS@EXDB1> /S
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CHAPTER 6 MAKING PCBSSYS@EXDB1> @q
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CHAPTER 6 MAKING PCBSControlDescri
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CHAPTER 6 MAKING PCBSthe normal ca
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CHAPTER 6 MAKING PCBSEnter value f
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CHAPTER 6 MAKING PCBSphysical read
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CHAPTER 6 MAKING PCBStransaction t
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CHAPTER 6 MAKING PCBSSYS@EXDB1> se
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CHAPTER 7 RESOURCE MANAGEMENTimpor
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CHAPTER 7 RESOURCE MANAGEMENTSQL>
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CHAPTER 7 RESOURCE MANAGEMENTSessi
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CHAPTER 7 RESOURCE MANAGEMENTrelat
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CHAPTER 7 RESOURCE MANAGEMENTdbms_
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CHAPTER 7 RESOURCE MANAGEMENTcomme
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CHAPTER 7 RESOURCE MANAGEMENTStep
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CHAPTER 7 RESOURCE MANAGEMENTNow,
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CHAPTER 7 RESOURCE MANAGEMENT50% m
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CHAPTER 7 RESOURCE MANAGEMENTLIST
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C H A P T E R 8Configuring ExadataO
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CHAPTER 8 CONFIGURING EXADATAThe P
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CHAPTER 8 CONFIGURING EXADATAregis
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CHAPTER 8 CONFIGURING EXADATAFile
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CHAPTER 8 CONFIGURING EXADATAFile
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CHAPTER 8 CONFIGURING EXADATA10. U
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CHAPTER 9 RECOVERING EXADATAprovid
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CHAPTER 9 RECOVERING EXADATAconfig
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CHAPTER 12 MONITORING EXADATA PERF
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CHAPTER 13 MIGRATING TO EXADATA Ke
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CHAPTER 13 MIGRATING TO EXADATA2.
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C H A P T E R 14Storage LayoutIn Or
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CHAPTER 14 STORAGE LAYOUTFailure G
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CHAPTER 14 STORAGE LAYOUTGrid Disk
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CHAPTER 14 STORAGE LAYOUTASM Disk
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CHAPTER 14 STORAGE LAYOUT1 st Grid
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CHAPTER 14 STORAGE LAYOUTTable 14-
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CHAPTER 14 STORAGE LAYOUTparameter
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CHAPTER 14 STORAGE LAYOUTLinux Par
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CHAPTER 14 STORAGE LAYOUTsystem. B
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CHAPTER 14 STORAGE LAYOUTCell Secu
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CHAPTER 15 COMPUTE NODE LAYOUTCPU
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C H A P T E R 16Unlearning Some Thi
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CHAPTER 16 UNLEARNING SOME THINGS
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A P P E N D I X ACellCLI and dcliCe
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APPENDIX A CELLCLI AND DCLILIST FL
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APPENDIX A CELLCLI AND DCLIEXDB 42
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APPENDIX A CELLCLI AND DCLICellCLI
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APPENDIX A CELLCLI AND DCLI• Dis
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A P P E N D I X BOnline Exadata Res
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A P P E N D I X CDiagnostic Scripts
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APPENDIX C DIAGNOSTIC SCRIPTSScrip
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Index• AAccess control list (ACL)
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• INDEXnetwork componentsclient a
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• INDEX• Epredicate offload, 36
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• INDEXOTHER_GROUPS consumer grou
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• INDEXCPU utilization, 152mixed
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• INDEXstructure, 105sub-query, 1
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Expert Oracle Exadatan n nKerry Osb
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Contents• About the Authors......
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• CONTENTSHow to Verify That Smar
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• CONTENTSControlling ESFC Usage
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• CONTENTSSummary ...............
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• CONTENTS• Chapter 12: Monitor
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• CONTENTS• Chapter 16: Unlearn
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About the Technical Reviewer Kevin
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