This metric shows the volume read response time detail of the volumes. This gives an indication of the volume response time in terms of total read requests for this volume.
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 |
|
11.2.0.x |
Every 15 Minutes |
It is calculated using the InstanceVolume Performance metric which in turn collects data from the GV$ASM_DISKGROUP_STAT and GV$ASM_VOLUME_STAT views.
To calculate the average read response time for each volume, the total read time is divided by the total number of read responses during the collection interval. The data is displayed for all instances that are part of the cluster.
No user action is required.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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