5.7

4 (Optional) To trigger an alert each time a fault occurs on the vCenter Server, select Generate alerts on
individual faults.
vCenter Operations Manager calculates fault badge scores based on the number of events retrieved from
the vCenter Server and does not weigh the importance of the events. Therefore, if the Generate alerts on
individual faults option is disabled, the Faults badge color might remain unchanged if a single event
occurs, and as a result, you might miss a critical fault event that occurs on the vCenter Server.
5 Click OK or Finish to save your settings, or select another option to configure.
6 Click Done to close the Configuration dialog box.
vCenter Operations Manager generates alerts based on the settings you have applied.
Modify Trend and Forecast Analysis Settings
You can define trend and forecast parameters around data points that include outlier detection or smoothing
filters.
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.
For information about techniques to address outliers and fluctuations in data points that might mislead the
trend and forecast calculations, see “Outlier Detection and Smoothing Filters in vCenter Operations
Manager,” on page 106.
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 6 Configure forecast and trends, and change the settings for trend and forecast analysis.
Option Description
Forecast Functions
Do not forecast answers beyond
percentage % of the time range used
for analysis
Determines how far into the future to forecast data. If this setting is too
limited, it can cause Time Remaining data in the dashboard to appear as a
dash (-). This occurs because vCenter Operations Manager cannot calculate
the remaining values within the forecast period.
Forecast Method
Select Best Fit from all Forecast
Methods
Instructs vCenter Operations Manager to determine the function with the
least potential error. vCenter Operations Manager applies all functions
before determining the function with the best fit. The best fit function is based
only on the current data.
Eliminate functions that have more
than percentage % of curvature
change beyond fitted data and prior
to forecast limit
Discards functions that cause the trend to increase or decrease at a faster rate
than the specified setting.
VMware vCenter Operations Manager Getting Started Guide
104 VMware, Inc.