This metric gives the age (in seconds) of the first message in the persistent queue per subscriber for all non-system queues in the database.
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.
Target Version |
Collection Frequency |
11.2.0.x |
Every 30 Minutes |
This is calculated using the ENQ_TIME of the messages in the queue per subscriber and then the oldest amongst all per subscriber is taken.
The following views/tables are used for the calculation:
When using persistent queues for storing and propagating messages, monitor this metric to get the age of first message in the queue per subscriber.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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