Expert Oracle Exadata - Parent Directory

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CHAPTER 3 HYBRID COLUMNAR COMPRESSIONSUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:06.21SYS@SANDBOX1> select /*+ parallel (a 32) */ sum(pk_col) from kso.skew3_oltp a ;SUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:05.79SYS@SANDBOX1> select /*+ parallel (a 32) */ sum(pk_col) from kso.skew3_basic a ;SUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:05.26SYS@SANDBOX1> select /*+ parallel (a 32) */ sum(pk_col) from kso.skew3_hcc1 a ;SUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:03.56SYS@SANDBOX1> select /*+ parallel (a 32) */ sum(pk_col) from kso.skew3_hcc2 a ;SUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:03.39SYS@SANDBOX1> select /*+ parallel (a 32) */ sum(pk_col) from kso.skew3_hcc3 a ;SUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:03.36SYS@SANDBOX1> select /*+ parallel (a 32) */ sum(pk_col) from kso.skew3_hcc4 a ;81
CHAPTER 3 HYBRID COLUMNAR COMPRESSIONSUM(PK_COL)-----------6.1800E+151 row selected.Elapsed: 00:00:04.78Table 3-4 shows the timings for the unqualified query in a tabular format.Table 3-4. Unqualified Query Timing on SKEW3Table Name Compress For Compression Ratio Run Time Run Time RatioSKEW3 6.21SKEW3_OLTP OLTP 1.4 5.79 0.93SKEW3_BASIC BASIC 1.6 5.26 0.85SKEW3_HCC1 QUERY LOW 4.0 3.56 0.57SKEW3_HCC2 QUERY HIGH 45.6 3.39 0.55SKEW3_HCC3 ARCHIVE LOW 45.6 3.36 0.54SKEW3_HCC4 ARCHIVE HIGH 55.9 4.78 0.77The query does not require a lot of CPU resources on the DB server. As a result, the savings in I/Otime more than offset the increased CPU. Note that the rather significant CPU requirements of theARCHIVE HIGH decompression caused the elapsed time to increase for this test over the less CPUintensivealgorithms. Nevertheless, it was still faster than the uncompressed run. Here’s a snapshot oftop output while one of these queries was running.top - 15:37:13 up 4 days, 7:14, 9 users, load average: 5.00, 2.01, 2.50Tasks: 867 total, 7 running, 860 sleeping, 0 stopped, 0 zombieCpu(s): 25.2%us, 0.9%sy, 0.0%ni, 73.4%id, 0.5%wa, 0.0%hi, 0.1%si, 0.0%stMem: 74027752k total, 35193896k used, 38833856k free, 346568k buffersSwap: 16771852k total, 568488k used, 16203364k free, 29976856k cachedPID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND25414 oracle 16 0 10.0g 40m 31m S 33.0 0.1 0:13.75 ora_p001_SANDBOX125474 oracle 15 0 10.0g 39m 30m S 32.4 0.1 0:13.54 ora_p012_SANDBOX125472 oracle 15 0 10.0g 37m 29m S 28.8 0.1 0:13.45 ora_p011_SANDBOX125420 oracle 16 0 10.0g 35m 28m R 27.8 0.0 0:13.71 ora_p004_SANDBOX125418 oracle 15 0 10.0g 39m 31m R 27.4 0.1 0:13.78 ora_p003_SANDBOX125435 oracle 15 0 10.0g 38m 30m S 27.4 0.1 0:13.46 ora_p008_SANDBOX125478 oracle 15 0 10.0g 38m 30m S 27.1 0.1 0:13.75 ora_p014_SANDBOX125428 oracle 15 0 10.0g 38m 31m S 24.8 0.1 0:13.81 ora_p005_SANDBOX182
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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 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 PCBS642 05cq2hb1r
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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 MANAGEMENTResou
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CHAPTER 7 RESOURCE MANAGEMENTdbms_
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CHAPTER 7 RESOURCE MANAGEMENTcomme
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CHAPTER 7 RESOURCE MANAGEMENTBEGIN
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CHAPTER 7 RESOURCE MANAGEMENTStep
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CHAPTER 7 RESOURCE MANAGEMENTAccor
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CHAPTER 7 RESOURCE MANAGEMENTNow,
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CHAPTER 7 RESOURCE MANAGEMENTFigur
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CHAPTER 7 RESOURCE MANAGEMENTOver-
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CHAPTER 7 RESOURCE MANAGEMENT50% m
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CHAPTER 7 RESOURCE MANAGEMENT Note
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CHAPTER 7 RESOURCE MANAGEMENTI/O R
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CHAPTER 7 RESOURCE MANAGEMENTdbPla
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CHAPTER 7 RESOURCE MANAGEMENTAn IO
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CHAPTER 7 RESOURCE MANAGEMENTgroup
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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 EXADATATable
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CHAPTER 8 CONFIGURING EXADATAFile
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CHAPTER 8 CONFIGURING EXADATAMachi
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CHAPTER 8 CONFIGURING EXADATAFile
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CHAPTER 8 CONFIGURING EXADATA• /
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CHAPTER 8 CONFIGURING EXADATA10. U
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CHAPTER 9 RECOVERING EXADATAprovid
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CHAPTER 9 RECOVERING EXADATANetmas
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CHAPTER 9 RECOVERING EXADATASystem
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CHAPTER 9 RECOVERING EXADATA-rw-r-
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CHAPTER 9 RECOVERING EXADATASYS:+A
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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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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 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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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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