Missing Media File Count

Description

This metric returns the count of missing media files.

This is a database-level metric. For cluster databases, this metric is monitored at the cluster database target level and not by member instances.

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.

SELECT count(file#) INTO l_missing_media_files
  FROM v$datafile_header
  WHERE error is not null AND error != 'OFFLINE NORMAL';