Actual Minimum Percent Free lists the amount of free disk space on the fullest disk as a percentage of the disk size. If the imbalance is zero, then this represents the total free space. Since all allocations are done evenly across all disks, the minimum free space limits how much space can be used.
If one disk has only one percent free, then only one percent of the space in the disk group is really available for allocation, even if the rest of the disks are only half full.
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 |
|
10.1.0.x; 10.2.0.x; 11.1.0.x; 11.2.0.x |
Every 15 Minutes |
Actual Minimum Percent Free is calculated as 100 * (min(free_mb / total_mb)), where free_mb and total_mb are columns in V$ASM_DISK_STAT.
If the actual minimum percent free is a low number, a configuration change may be required in order to provide an even distribution of file extents and space usage across all disks in a disk group.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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