5.8.5

Table Of Contents
Assess Virtual Machine Capacity Use
Identify optimization opportunities for a single virtual machine with vCenter Operations Manager.
Prerequisites
Verify that you are logged in to a vSphere Client and that vCenter Operations Manager is open.
Procedure
1 In the inventory pane, select the object that you want to inspect.
2 Click the Views tab under the Planning tab and select Virtual Machine Capacity Usage - Summary.
If the Host CPU and Memory use is high, the virtual machine does not have enough capacity to
perform assigned work.
What to do next
Determine whether you can optimize performance for this virtual machine by assigning capacity to match
typical load demand. If the virtual machine is powered off or idle, you can decommission the virtual
machine to reclaim unused capacity.
Implement a strategy for optimizing use of this virtual machine based on the information you obtain from
the view. Save your results by exporting the information to an export file.
Assess Virtual Machine Optimization Data
To optimize data with vCenter Operations Manager, identify overused and underused virtual machines for
a selected object.
A virtual machine can be oversized in memory and undersized in CPU or the reverse.
vCenter Operations Manager counts the virtual machine in both the oversized virtual machine count and in
the undersized virtual machine count.
This double counting can be misleading because you might expect the values for powered-off, undersized,
oversized, and idle virtual machines to add up to the total virtual machine value.
Prerequisites
Verify that you are logged in to a vSphere Client and that vCenter Operations Manager is open.
Procedure
1 In the inventory pane, select the object that you want to inspect.
2 Click the Views tab under the Planning tab and select Virtual Machine Optimization - Summary.
3 Examine the Total Virtual Machines, Powered-Off Virtual Machines, Undersized Virtual Machines,
Oversized Virtual Machines, and Idle Virtual Machines values to determine how many machines
assigned to this object can be optimized.
Table 51. Example of Virtual Machine Optimization - Summary
Virtual Machine Type Number
Total Virtual Machines 12
Powered-Off Virtual Machines 0
Undersized Virtual Machines 6
Oversized Virtual Machines 6
Idle Virtual Machines 1
VMware vCenter Operations Manager Getting Started Guide
56 VMware, Inc.