Viewing threshold properties
Perform this task to view performance
threshold properties for a storage device. Performance Manager lists performance
properties and statistics in the Performance Threshold summary table.
Steps
Perform the following steps to view performance threshold
properties for a storage device:
- From the IBM Director Task pane, click Multiple Device
Manager.
- Click Manage performance. The performance management
tasks are displayed.
- Drag the Thresholds icon from the Task pane to the Group Contents
pane of the IBM Director.
- Drop the icon on a storage device in the Group Contents pane.
The Thresholds panel opens.
The Threshold summary panel lists the thresholds,
threshold status, threshold values, alert, and filter information available
for selected storage devices. Each device has multiple line items, one for
each threshold.
- Select a single threshold for a single device from the Thresholds table
to view its properties.
- Click Properties to view or change threshold properties.
The properties for the selected device are displayed.
Result
The Performance Threshold summary panel shows the number of warnings and
errors for the following thresholds. The status is either disabled or enabled:
 | Note: The thresholds are device dependent. Only some
of the listed thresholds might be displayed for the selected device. |
- Disk utilization
- Percent of time busy
- Percent of sequential I/Os
- Percent of sequential I/Os
- Nonvolatile storage
- Percent of time full
- Average cache holding time
- Measured in seconds
- I/O rate
- Total number of I/O requests per second
- VDisk I/O rate
- Total number of virtual disk I/Os for each I/O group
- VDisk bytes per second
- Virtual disk bytes per second for each I/O group
- MDisk I/O rate
- Total number of managed disk I/Os for each managed disk group
- MDisk bytes per second
- For each managed disk group
- Data transaction (count per second)
- Total server-level data transaction rate
- Data transaction for updates (count per second)
- Total server-level data transaction rate for updates to system objects
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