5.8.5

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 capacity and time remaining settings are reconfigured.
Example: Examples of Capacity and Time Remaining Settings
These examples show how some of the settings are used.
Compute Resources to
Analyze
If you have a mixed host environment or your ESX or vSphere version limits
the ability to view disk I/O metrics, you can turn off that resource type.
Usable Capacity
If you stress the load on your systems and want extra headroom for error,
activate buffer support with this setting.
What to do next
If you selected Usable Capacity, configure the high availability and buffer settings in section 3b Usable
capacity of the policy configuration dialog box.
Modify Usable Capacity Settings
If you activate the use of usable capacity, you can modify usable capacity settings to specify High
Availability, calculation, and buffer rules.
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.
The capacity buffer is a percentage of virtual machine capacity that is held in reserve to prevent the virtual
machine from consuming 100 percent of its resources.. Buffer limits apply to hosts and virtual machines. For
example, if a virtual machine is used at 50 percent capacity, adding a scenario that would simulate using
another 50 percent of capacity onto that virtual machine puts the virtual machine at its capacity limit. A
peak load might demand more performance from the virtual machine than it can deliver. The buffer limits
help prevent this event by forecasting the remaining capacity. This information appears in the following
places:
n
In the Time Remaining and Trend Information table on the Summary tab under the Planning tab.
n
In the Total Remaining column of some views on the Views tab under the Planning tab.
NOTE For the following settings to apply, you must have set the basis for Capacity Remaining to Usable
Capacity on the Capacity and Time Remaining tab.
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.
VMware vCenter Operations Manager Getting Started Guide
98 VMware, Inc.