Expert Oracle Exadata - Parent Directory

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CHAPTER 4 STORAGE INDEXES-------------------------------------------------------------------------| Id|Operation |Name | Rows|Bytes|Cost (%CPU)|Time |-------------------------------------------------------------------------| 0|SELECT STATEMENT | | | | 535K(100)| || 1| SORT AGGREGATE | | 1| 8 | | ||* 2| TABLE ACCESS STORAGE FULL|SKEW3 | 384|3072 | 535K (2)|01:47:04|-------------------------------------------------------------------------Predicate Information (identified by operation id):---------------------------------------------------2 - storage("COL3"='20-OCT-05')filter("COL3"='20-OCT-05')20 rows selected.SYS@EXDB1> /Enter value for sql_id: 2s58n6d3mzkmnEnter value for child_no:PLAN_TABLE_OUTPUT--------------------------------------------------------------------------------------------SQL_ID 2s58n6d3mzkmn, child number 0-------------------------------------select count(*) from kso.skew3 where col3 = '20-OCT-2005'Plan hash value: 2684249835------------------------------------------------------------------------------------| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |------------------------------------------------------------------------------------| 0 | SELECT STATEMENT | | | | 531K(100)| || 1 | SORT AGGREGATE | | 1 | 8 | | ||* 2 | TABLE ACCESS STORAGE FULL| SKEW3 | 384 | 3072 | 531K (1)| 01:46:24 |------------------------------------------------------------------------------------Predicate Information (identified by operation id):---------------------------------------------------2 - storage("COL3"=TO_DATE(' 2005-10-20 00:00:00', 'syyyy-mm-ddhh24:mi:ss'))filter("COL3"=TO_DATE(' 2005-10-20 00:00:00', 'syyyy-mm-ddhh24:mi:ss'))22 rows selected.It appears that the optimizer didn’t recognize the two-digit date as a date. At the very least, theoptimizer failed to apply the to_date function to the literal and so the Storage Index was not used.Fortunately most of these types of data conversion issues have been resolved with the later releases.Here’s the same test using cellsrv 11.2.2.2.0:121
CHAPTER 4 STORAGE INDEXESSYS@SANDBOX> @siNAMEVALUE---------------------------------------------------------------------- ---------------cell physical IO bytes saved by storage index 0SYS@SANDBOX> select count(*) from kso.skew3 where col3 = '20-OCT-05';COUNT(*)----------0SYS@SANDBOX> @siNAMEVALUE---------------------------------------------------------------------- ---------------cell physical IO bytes saved by storage index 16024526848So as you can see, this conversion issue has been resolved. So why bring it up? Well the point is thatthe behavior of Storage Indexes have undergone numerous changes as the product has matured. As aresult, we have built a set of test cases that we use to verify behavior after each patch in our lab. Our testcases primarily verify comparison operators (=, select count(*) from kso.skew3 where trunc(col3) = '20-OCT-2005';COUNT(*)----------4122
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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? Kevin S
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CHAPTER 1 WHAT IS EXADATA?Software
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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 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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CHAPTER 3 HYBRID COLUMNAR COMPRESS
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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 MANAGEMENTAccor
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C H A P T E R 8Configuring ExadataO
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CHAPTER 8 CONFIGURING EXADATATable
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CHAPTER 9 RECOVERING EXADATAprovid
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CHAPTER 9 RECOVERING EXADATA-rw-r-
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CHAPTER 10 EXADATA WAIT EVENTSSYS@
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CHAPTER 10 EXADATA WAIT EVENTScell
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CHAPTER 10 EXADATA WAIT EVENTScolu
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CHAPTER 10 EXADATA WAIT EVENTSYou
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C H A P T E R 11Understanding Exada
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CHAPTER 11 UNDERSTANDING EXADATA P
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CHAPTER 12 MONITORING EXADATA PERF
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CHAPTER 13 MIGRATING TO EXADATA Ke
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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 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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