This metric shows the capacity of the disk group based on the type of the disk group. This column indicates the amount of free space that can be "safely" utilized taking mirroring into account, and yet is able to restore redundancy after disk failure.
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 |
|
10.2.0.x; 11.1.0.x; 11.2.0.x |
Every 15 Minutes |
This metric is collected using the V$ASM_DISKGROUP_STAT view.
Total Safely Usable MB = (total_mb - required_mirror_free_mb)/redundancy_factor
Where total_mb and required_mirror_free_mb come from the view column, and redundancy factor is 1 for External Redundancy Disk Group, 2 for Normal Redundancy Disk Group, and 3 for High Redundancy Disk Group.
Consider adding more disks to the disk group or removing existing files from the disk group.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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