Owner's manual

Select Save Thresholds to save any thresholds that have been modified and delete any disabled
thresholds.
Creating Thresholds
To create a threshold, select the gray threshold indicator with the left mouse button, holding the
button down and dragging the indicator to the right until you reach the appropriate value. The
threshold value displayed in the indicator changes as you are dragging. Release the mouse button.
Select Save Threshold to create the threshold with the displayed value.
Modifying Thresholds
To modify a threshold, select the threshold indicator with the left mouse button, holding the button
down, and drag the indicator to the right until you reach the appropriate value. The threshold
value displayed in the indicator changes as you are dragging. Release the mouse button.
NOTE: If the indicator moves below 6 percent, it changes to gray to indicate that it is disabled.
When you save the thresholds, disabled thresholds are deleted. A critical threshold can never go
above 99 percent, or lower than a warning threshold plus 3 percent. Therefore, if the warning
threshold is 85 percent, the valid range for the critical threshold is 88 percent to 99 percent. A
warning threshold can never be higher than the critical threshold minus 3 percent. Therefore if the
critical threshold is 95 percent, the valid range for the warning threshold is 6 percent to 92 percent.
Deleting Thresholds
To delete a threshold, select the threshold indicator with the left mouse button, holding the button
down, and drag the threshold indicator to the left until the indicator turns gray.
When you save the thresholds, disabled thresholds are deleted.
Logical Disk Space
• Volume—Name of the logical drive for which statistical information is gathered.
• Free Space (MB)—Unallocated space on the disk drive in megabytes. One megabyte equals
1,048,576 bytes.
• Free Space %—Ratio of the free space available on the logical disk unit to the total usable
space provided by the selected logical disk drive.
• Queue Length—Average number of both read and write requests that were queued for the
selected disk during the sample interval.
• Disk Busy Time % (Thresholds Supported)—Percentage of elapsed time that the selected disk
drive is servicing read or write requests.
Processors
• CPU—Name of the processor for which statistical information is gathered.
• Interrupts/sec—Average number of hardware interrupts the processor is receiving and servicing
in each second. It does not include Deferred Procedure Calls or DPCs, which are counted
separately. This value is an indirect indicator of the activity of devices that generate interrupts,
such as the system clock, the mouse, disk drivers, data communication lines, network interface
cards, and other peripheral devices. These devices normally interrupt the processor when they
have completed a task or require attention. Normal thread execution is suspended during
interrupts. Most system clocks interrupt the processor every 10 ms, creating a background of
interrupt activity. This counter displays the difference between the values observed in the last
two samples, divided by the duration of the sample interval.
• % User CPU Time—Percentage of non-idle processor time spent in user mode. (User mode is
a restricted processing mode designed for applications, environment subsystems, and integral
subsystems. The alternative, privileged mode, is designed for OS components and allows
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