Waiting Session Count

Description

This metric represents the number of sessions waiting 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.

Data Source

SELECT count(*) 
  FROM v$session_wait 
  WHERE wait_time = 0 and event not in IdleEvents

See Idle Events

User Action

When this count is high, the system is doing more waiting than anything else. 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

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