5.6

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 3b Usable Capacity and change the settings for usable capacity.
Option Description
Use High Availability (HA)
Configuration and reduced capacity
If HA is configured on the clusters in your virtual environment, selecting this
option excludes the CPU and memory reserved per the HA settings when
calculating capacity scores in vCenter Operations Manager.
Capacity Buffer - % of resource
capacity to reserve as buffer
Sets the percent of reserve capacity for CPU, memory, disk I/O, or disk space.
Capacity calculation rules
Select how to calculate capacity.
n
Use last known capacity. Bases capacity calculations on the last known
capacity for the selected data interval. This setting affects the remaining
capacity. Although you expect a proportional relationship between
utilization and capacity, the average utilization might exceed the last
known capacity when the capacity drops.
n
Use actual capacity. Bases capacity calculations on the average known
capacity for the selected data interval.
4 Click OK or Finish to save your settings, or select another option to configure.
5 Click Done to close the Configuration dialog box.
The usable capacity settings are reconfigured.
Example: Examples of Usable Capacity Global Settings
These examples show how some of the settings are used.
Use last known capacity
If the interval included in the view is two months, and today is June 30, views
of capacity such as Average Virtual Machine Capacity show you the capacity
used on June 30.
Use actual capacity
If the interval included in the view is two months, and today is June 30, views
of capacity show you the average of capacity used in May and June.
Modify Usage Calculation Settings
To specify the number of hours over which the average capacity usage is calculated, and to identify peak hours
or spikes by excluding data that falls into a regular pattern, modify the Usage Calculation global settings.
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.
VMware vCenter Operations Manager Getting Started Guide
94 VMware, Inc.