Number of Ready Messages

Description

This metric shows the number of messages in a persistent queue that are ready to be dequeued by the apply process. The apply process has not yet attempted to dequeue these messages.

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

10.1.0.x; 10.2.0.x; 11.1.0.x; 11.2.0.x

Every 5 Minutes

Data Source

The data source includes the following data dictionary views: DBA_QUEUES, DBA_APPLY, and AQ$queue_table_name.

User Action

Monitor this metric to ensure that the apply process is dequeuing messages that are ready.

Related Topics

About Alerts

About the Metric Detail Page

Editing Thresholds

Understanding Line Charts

Streams Apply Process