This metric represents the percentage of database call time that is spent on the CPU. Although there is no ‘correct’ value for this metric, it can be used to detect a change in the operation of a system, for example, a drop in Database CPU time from 50% to 25%. ('No correct value' means that there is no single value that can be applied to any database. The value is a characteristic of the system and the applications running on the system.)
The rest of the information in this section is only valid for this metric when it appears in either the Enterprise Manager Grid Control or the Enterprise Manager Database Control (if applicable).
The following table shows how often the metric's value is collected and compared against the default thresholds. The 'Consecutive Number of Occurrences Preceding Notification' column indicates the consecutive number of times the comparison against thresholds should hold TRUE before an alert is generated.
|
Target Version |
Server Evaluation Frequency |
Collection Frequency |
Upload Frequency |
Operator |
Default Warning Threshold |
Default Critical Threshold |
Consecutive Number of Occurrences Preceding Notification |
Alert Text |
|
10.1.0.x; 10.2.0.x; 11.1.0.x; 11.2.0.x |
Every Minute |
Not Defined |
After Every Sample |
< |
Not Defined |
Not Defined |
2 |
Generated By Database Server |
Not available
Investigate the change is CPU usage by using Automatic Database Diagnostic Monitor (ADDM). ADDM reports are available from a number of locations including the Database Home page and Advisor Central. Examine the report for increased time spent in wait events.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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