This metric displays the I/O response time details of volumes present in a cluster. This provides an indication of the volume response time in terms of total I/O 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 |
|
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/O response time for each volume, the total I/O time is divided by the total number of I/O responses during the collection interval. The data is then 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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