Dell Vizioncore Bedienungsanleitung Seite 353

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Working with Data 353
Working with Thresholds
Example: Optimizing Performance
Derived metrics can also help you optimize performance by reducing the number of
calculations that need to be performed at run-time. For example, if there are multiple
rules that need to use the same complex metric expression in their conditions, creating a
derived metric with this expression and using it in these rules’ conditions would have a
positive impact on performance: the calculation specified in the metric expression
would only need to be performed each time an instance of the derived metric is created
instead of each time the rule is evaluated.
Working with Thresholds
Threshold levels in metrics are useful in situations when you need to reference a
specific metric value multiple times, for example in derived metrics or rules.
You create new thresholds metrics and manage the existing ones using the dashboards
that come with the Administration module. For complete information, see the following
sections:
•“Managing Thresholds” on page 353
•“Creating Thresholds” on page 361
•“Defining Thresholds” on page 362
Managing Thresholds
The Manage Threshold dashboard allows you to create new registry variables, assign
values to registry variables, and manage registry variables. For complete information,
see the following sections:
•“Accessing the Manage Thresholds dashboard” on page 353
•“Editing threshold permissions” on page 355
•“Deleting thresholds” on page 359
•“Viewing and editing thresholds” on page 360
Accessing the Manage Thresholds dashboard
The Manage Thresholds dashboard includes a list of the thresholds that exist in your
monitoring environment and includes mechanisms for adding and deleting thresholds.
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