Oracle Database 11 g - Online Public Access Catalog

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222 CHAPTER 4 ■ PERFORMANCE MANAGEMENTPerformance-Related Changes inDatabase ControlThere are numerous changes in Database Control pertaining to database performance. SinceOracle Database 11g has introduced several new performance features, Database Control will,of course, support those new features. Our focus is on the main changes to the Performancepage in Database Control.Customized Performance PageYou can now set up a customized Database Performance page in Database Control to suit yourpurposes. Database Control stores the customized settings in its repository and retrieves themfor your session’s use when you log in again. You can customize things such as which chartsappear on the Performance page in the Active Sessions section. You can also configure whetherbaseline values should appear in the Throughput and Services charts.Click the Settings link to go to the Performance Page Settings page. The Performance PageSettings page has two sections. The Detailed Chart Settings section lets you choose defaults fordisplaying the instance activity charts. The Baseline Display Settings section lets you select ifand how the AWR baseline values are displayed in the Performance page charts.The Detailed Chart Settings section on the Performance Page Settings page lets you makethe following display choices for the Performance page:• Default View: You can select from Throughput, I/O, Parallel Execution, and Services.• Throughput Chart Settings: You can choose Per Second or Per Transaction.• I/O Chart Settings: You can choose from I/O Function, I/O Type, and Consumer Group.Here are the steps to follow to change the display of the instance activity charts:1. Click Settings on the Performance page.2. Choose the default view you want to appear in the Average Active Session section bymaking a choice in the default view. You can choose among Throughput, I/O, ParallelExecution, and Services.3. In Throughput Chart Settings, select Per Second or Per Transaction.4. Under I/O Chart Settings, select from I/O Function, I/O Type, or Consumer Group asthe default I/O breakdown on the I/O tab.5. Click OK.The Performance Page Settings page that appears now will reflect the new display choicesyou made, as shown in Figure 4-2.
CHAPTER 4 ■ PERFORMANCE MANAGEMENT 223Figure 4-2. The Performance Page Settings pageIf you want, you can also show the baseline values on the performance page charts.Average Active SessionsThe average active sessions section on the Performance page offers a window into the performanceof the database by showing, in graphical form, what proportion of time users are waitingand the time they spend actually doing something, such as IO. Monitoring user activity andprobing further when there are spikes in CPU usage, for example, helps you identify the causesof poor performance.ADDM Performance AnalysisOn the Database Control Database home page, you can now see an ADDM performance analysissummary table, which provides you a quick overview of current ADDM findings. This is thesame table as the one you’d get if you clicked ADDM Findings in the Diagnostic Summary sectionon the Database home page. Figure 4-3 shows the ADDM Performance Analysis table.
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The EXPERT’s VOIce ® IN ORACLEAl
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Contents at a GlanceAbout the Autho
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■CONTENTSixSQL*Plus New Features
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■CONTENTSxiEnterprise Manager Int
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■CONTENTSxiiiCombined Capture and
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About the Authors■SAM ALAPATI is
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xxii■ACKNOWLEDGMENTSNothing I do
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xxiv■INTRODUCTIONPerformance Mana
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xxvi■INTRODUCTION• The easy add
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2 CHAPTER 1 ■ INSTALLING, UPGRADI
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168 CHAPTER 4 ■ PERFORMANCE MANAG
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CHAPTER 7■ ■ ■Data PumpDBAs a
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CHAPTER 7 ■ DATA PUMP 315if test
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CHAPTER 7 ■ DATA PUMP 317DBA11g1
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CHAPTER 7 ■ DATA PUMP 319Encrypti
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CHAPTER 7 ■ DATA PUMP 321Please b
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CHAPTER 7 ■ DATA PUMP 323Remappin
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CHAPTER 7 ■ DATA PUMP 325SELECT d
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CHAPTER 7 ■ DATA PUMP 327Document
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CHAPTER 7 ■ DATA PUMP 329SQL> sel
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CHAPTER 7 ■ DATA PUMP 331SQL> sel
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CHAPTER 7 ■ DATA PUMP 333DBMS_OUT
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CHAPTER 7 ■ DATA PUMP 335If you a
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CHAPTER 9■ ■ ■Storage Managem
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CHAPTER 9 ■ STORAGE MANAGEMENT 36
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446 CHAPTER 11 ■ APPLICATION DEVE
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566 ■INDEXadvise failure command,
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