6.4

Table Of Contents
If you select Power O Allowed, and the machine is running, the action veries whether VMware Tools is
installed and running.
n
If VMware Tools are installed and running, the virtual machine is shut down before completing the
action.
n
If VMware Tools are not running or not installed, the virtual machine is powered o without regard for
the state of the operating system.
If you do not select Power O Allowed and you are decreasing the CPU count or memory, or the hot plug is
not enabled for increasing the CPU count or memory, the action does not run and the failure is reported in
Recent Tasks.
Power Off Allowed When Changing CPU Count or Memory
When you run the actions that change the CPU count and the amount of memory, you must consider several
factors to determine if you want to use the Power O Allowed option. These factors include whether you are
increasing or decreasing the CPU or memory and whether the target virtual machines are powered on. If
you increasing the CPU or memory values, whether hot plug is enabled also aects how you apply the
option when you run the action.
How you use Power O Allowed when you are decreasing the CPU count or the amount of memory
depends on the power state of the target virtual machines.
Table 16. Decreasing CPU Count and Memory Behavior Based On Options
Virtual Machine Power State Power Off Allowed Selected Results
On Yes If VMware Tools is installed and
running, the action shuts down the
virtual machine, decreases the CPU or
memory, and powers the machine back
on.
If VMware Tools is not installed, the
action powers o the virtual machine,
decreases the CPU or memory, and
powers the machine back on.
On No The action does not run on the virtual
machine.
O Not applicable. The virtual machine
is powered o.
The action decreases the value and
leaves the virtual machine in a
powered o state.
How you use Power O Allowed when you are increasing the CPU count or the amount of memory
depends on several factors, including the state of the target virtual machine and whether hot plug is
enabled. Use the following information to determine which scenario applies to your target objects.
If you are increasing the CPU count, you must consider the power state of the virtual machine and whether
CPU Hot Plug is enabled when determining whether to apply Power O Allowed.
vRealize Operations Manager User Guide
62 VMware, Inc.