This is a database-level metric. For cluster databases, this metric is monitored at the cluster database target level and not by member instances.
This metric shows the approximate number of seconds required to failover to this standby database. This accounts for the startup time, if necessary, plus the remaining time required to apply all the available redo on the standby. If a bounce is not required, it is only the remaining apply time.
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 estimated time to failover is approximately %value% seconds. |
v$dataguard_stats
None
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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