Age of the first message in persistent queue per subscriber (seconds)

Description

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.

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 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:

  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 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

Copyright © 1996, 2009, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates.
Other names may be trademarks of their respective owners.