State of the first message in persistent queue per subscriber

Description

This metric gives the state of the first message in the persistent queue per subscriber for all non-system queues in the database.

Metric Summary

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

Data Source

This is calculated by finding the age of the first message in the subscriber of the queue and then the oldest amongst all is computed. Finally the state of this oldest message is fetched.

The following views/tables are used for the calculation:

  1. <SCHEMA>.AQ$_<QUEUE_TABLE>_S

  2. <SCHEMA>.AQ$_<QUEUE_TABLE>_I

  3. <SCHEMA>.AQ$<QUEUE_TABLE>

User Action

When using persistent queues for storing/propagating messages, monitor this metric to get the state of first message in the queue per subscriber.

Related Topics

About Alerts

About the Metric Detail Page

Editing Thresholds

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