You can monitor Oracle ASM performance with the Oracle Enterprise Manager Performance page, shown in Figure 7-11.
Figure 7-11 Oracle Automatic Storage Management Performance Page
To monitor Oracle ASM performance:
Access the Oracle Automatic Storage Management home page.
See "Accessing the Oracle Automatic Storage Management Home Page" for instructions.
Click the Performance link to view the Performance property page.
Determine the view and refresh rate of the performance graphs with the View and Refresh options. Click Refresh to manually refresh the graphs. The refresh option has the following two intervals:
Manual refresh: manual, 15 second interval, 30 second interval
Historical data: Last 24 hours, last 7 days, last 31 days
For more information, refer to "Performance and Scalability Considerations for Disk Groups".