This metric shows the Volumes I/O performance per second in terms of total I/O requests for all the Volumes, which are part of the cluster.
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 |
|
All Versions |
Every 15 Minutes |
It is calculated using the Instance Volume Performance metric which in turn collects data from the GV$ASM_DISKGROUP_STAT and GV$ASM_VOLUME_STAT views.
To calculate the average I/Os per second for each volume, the total number of I/O responses is divided by the total I/O time during the collection interval. The data is aggregated for all instances that are part of the cluster.
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Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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