Performance-Related Changes in Database Control - Oracle 11g

There are numerous changes in Database Control pertaining to databaseperformance. Since Oracle Database 11g has introduced several newperformance features, Database Control will,of course,support those newfeatures.Our focus is on the main changes to the Performance page in Database Control.

Customized Performance Page

You can now set up a customized Database Performance page in Database Control to suit your purposes.Database Control stores the customized settings in its repository and retrieves them for your session’s use when you log in again.You can customize things such as which charts appear on the Performance page in the Active Sessions section.You can also configure whether baseline values should appear in the Throughput and Services charts.

Click the Settings link to go to the Performance Page Settings page.ThePerformance Page Settings page has two sections.The Detailed Chart Settings section lets you choose defaults for displaying the instance activity charts.The Baseline Display Settings section lets you select if and 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 make the following display choices for the Performance page:

  • Default View:You can select from Throughput,I/O,Parallel Execution, and Services.
  • Through put 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 activitycharts:

  1. Click Settings on the Performance page.
  2. Choose the default view you want to appear in the Average Active Session section by making a choice in the default view.You can choose among Through put,I/O, Parallel Execution,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 as the 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 choices you made,as shown in Figure

The Performance Page Settings page

The Performance Page Settings page

Average Active Sessions

The average active sessions section on the Performance page offers a window into the performance of the database by showing, in graphical form, what proportion of time users are waiting and the time they spend actually doing something, such as IO.Monitoring user activity and probing further when there are spikes in CPU usage, for example, helps you identify the causes of poor performance.

ADDM Performance Analysis

On the Database Control Database home page, you can now see an ADDM performance analysis summary table, which provides you a quick overview of current ADDM findings.This is the same table as the one you’d get if you clicked ADDM Findings in the Diagnostic Summary section on the Database home page. Figure shows the ADDM Performance Analysis table.

The ADDM Performance Analysis table

The ADDM Performance Analysis table

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