Expert Oracle Exadata - Parent Directory

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CHAPTER 12 MONITORING EXADATA PERFORMANCEFigure 12-11. Selecting a “highest-average” chart for monitoring cells with highest read I/O requestsTo see the cell metrics available, you’ll have to select Oracle Exadata Storage Server as the chart type andpick one of the metrics to show. You probably want to use the Group Statistics for monitoring the wholecell group as a starting point, instead of monitoring all 14 storage cells (in a full rack) separately. Thegroup statistics allow you to sum together stats from all the cells in the group (when monitoring totaldisk I/O throughput, for example) or show minimum, maximum, averages and standard deviationacross all cells (when monitoring average disk I/O response times, for example). Pay attention to whatthe metric means and which aggregation operations make sense for a given metric. For example, itdoesn’t make much sense to display the sum of all average disk I/O response times in a chart. Themetrics starting with Avg show average values over multiple objects monitored. For example, the AvgCelldisk Reads (MB) monitors average megabytes read per celldisk. On the other hand, the Total CelldiskReads (MB) metric sums together the MB read by all cell disks in a cell. And now if you use the GroupStatistics option to monitor multiple cells, you should use Sum to see the total MB read from cell disksacross all cells and Average or Min/Max to see the average per cell or a cell with the smallest or biggestMB read cell disk throughput.If you do want to monitor individual cells— for example, the two storage cells with the worst offloadefficiency—then you can either define a separate offloading efficiency chart for each cell (and end upwith 14 charts in a full rack configuration) or you can select Targets With Lowest Average as the charttype, as shown in Figure 12-12.398
CHAPTER 12 MONITORING EXADATA PERFORMANCEFigure 12-12. Selecting a “lowest average” chart for monitoring cells with worst offload efficiencyYou can read more about the meaning of various metrics in the Oracle document “Enterprise ManagerSystem Monitoring Plug-In Metric Reference Manual for Oracle Exadata Storage Server.”Now, you can reorder the charts on the cell group dashboard by clicking the Reorder button asshown in Figure 12-10 earlier. This will show you a list of defined charts, which you can then reorder onthe screen, as seen in Figure 12-13.399
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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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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 SCANS
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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 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 PCBSEnter value f
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CHAPTER 6 MAKING PCBSphysical read
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CHAPTER 7 RESOURCE MANAGEMENTimpor
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CHAPTER 7 RESOURCE MANAGEMENTSQL>
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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 9 RECOVERING EXADATAprovid
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CHAPTER 9 RECOVERING EXADATACellCL
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CHAPTER 10 EXADATA WAIT EVENTSSYS@
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CHAPTER 10 EXADATA WAIT EVENTScell
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C H A P T E R 11Understanding Exada
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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 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 DCLICellCLI
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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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