Disk Group Free (MB)

Description

This metric shows the unused capacity of the disk group in megabytes. It gives an indication of the free space available in a disk group.

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

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

Every 15 Minutes

After Every Sample

<=

Not Defined

Not Defined

1

Total free size for Disk Group %dg_name% has fallen to %value% (MB).

Multiple Thresholds

For this metric you can set different warning and critical threshold values for each "Disk Group Name" object.

If warning or critical threshold values are currently set for any "Disk Group Name" 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 "Disk Group Name" object, use the Edit Thresholds page. See Editing Thresholds for information on accessing the Edit Thresholds page.

Data Source

This metric is collected from the column FREE_MB in the view V$ASM_DISKGROUP for 10g Release 1 and the V$ASM_DISKGROUP_STAT view for 10g Release 2.

User Action

Consider adding more disks to the disk group or deleting existing files in the disk group.

Related Topics

About Alerts

About the Metric Detail Page

Editing Thresholds

Understanding Line Charts