Session Waiting for Event Count

Description

This metric represents the number of sessions waiting on a given wait event at the sample time.

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 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

pre-10g

Every Minute

After Every Sample

>

Not Defined

Not Defined

3

%value% sessions are waiting for event %event%.

Multiple Thresholds

For this metric you can set different warning and critical threshold values for each "Wait Event" object.

If warning or critical threshold values are currently set for any "Wait Event" object, those thresholds can be viewed on the Metric Detail page for this metric.

To specify or change warning or critical threshold values for each "Wait Event" object, use the Edit Thresholds page. See Editing Thresholds for information on accessing the Edit Thresholds page.

Data Source

For each metric index:

select count(1)

User Action

Evaluate the various types of wait activity using the real-time and historical performance monitoring capabilities of Enterprise Manager.

Related Topics

About Alerts

About the Metric Detail Page

Editing Thresholds

Understanding Line Charts