5.7

You set the percentage of affordable stress or underuse in the 4c Underused and stressed section of the Edit
Policy dialog box. Determine the area ratio for which you can afford to have high stress or low use in your
environment.
To determine the stress threshold for a day, multiply the stress area ratio by 100.
Demand in the stress zone/stressed zone * 100
For stress, even an hour or two per week might represent a problem, because during that time the capacity is
almost exhausted. Therefore, you can set a peak time period as well as the stress threshold, and specify the
maximum number of hours that can have stress levels above the specified threshold.
By setting this peak period, you define a "moving window" of a number of hours, and the stress calculation
will be applied to every such window in the Non-Trend Views Interval. The stress calculation is:
stressed % = max_(for each moving window)(demand area in the stress zone in the window/area of
stressed zone in the window)
Example: Calculating the Thresholds for Underused and Stressed Resources for Four Weekly Intervals
To set the thresholds for four weekly intervals, open the Configuration dialog box and click Manage Display
Settings. Set the Non-Trend Views Interval to Weekly and select 4 as the number of intervals to use.
Example: Limiting the Thresholds for Business Days and Hours
To restrict the stress limit to 8 business hours, Monday to Friday, specify the hours and days in the 3c Usage
calculation section of the policy configuration dialog box.
Select Which Badges Generate Alerts
You can select the badges for which you want alerts to appear on the Alerts tab in
vCenter Operations Manager.
Alerts are generated when a badge changes its color based on the badge score metrics.
An administrator can modify any policy in vCenter Operations Manager at any time. The changes that the
administrator applies affect all users. Therefore, the administrator must notify the users who are working with
vCenter Operations Manager about any new settings that are applied to the policies.
Prerequisites
Verify that you are logged in to a vSphere Client as an administrator, and vCenter Operations Manager is open.
Procedure
1 Click the Configuration link on the main vCenter Operations Manager page.
2 Create a new policy or open an existing policy for editing.
Option Description
To create a new policy
In the Manage Policies pane, click the Create Policy icon .
To modify an existing policy
In the Manage Policies pane, select the policy that you want to associate to
groups and click the Edit Policy icon .
3 Click 5 Configure Alerts and select the badges for which you want to generate alerts when their color
changes.
You can activate alerts for virtual machines, for other virtual infrastructure objects, and for groups.
Chapter 8 Set How Data Appears in vCenter Operations Manager
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