Displays (in seconds) how far the standby is behind the primary database. This metric will generate an alert on the standby database if it falls behind more than the user-specified threshold (if any).
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 |
Evaluation and Collection Frequency |
Upload Frequency |
Operator |
Default Warning Threshold |
Default Critical Threshold |
Consecutive Number of Occurrences Preceding Notification |
Alert Text |
|
10.2.0.x; 11.1.0.x; 11.2.0.x |
Every 5 Minutes |
After Every Sample |
> |
Not Defined |
Not Defined |
1 |
The standby database is approximately %value% seconds behind the primary database. |
v$dataguard_stats
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Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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