Enable Performance and Resource Optimization (PRO)

PRO is a features that support workload and application aware resource optimization within a virtualized environment. Based on performance and health data provided by Management Pack in SCOM, PRO can automatically or manually implement PRO tips, provide recommendation for minimizing downtime and accelerating time to resolution.

I'm assumed you have integrate operation manager with vmm. If not, pls refer to http://www.ms4u.info/2009/10/integrate-operation-manager-with-vmm.html

Once integrating complete, you can enable PRO feature either from

a) System Wide monitor
Go to Administration view, enter PRO settings in the general. Tick enable PRO tips and select Warning and Critical.
If you would like the PRO to perform automatic action, tick "Automatic implement PRO tips"

b) Individual host cluster
By default, system wide monitor will take effect if you did not enable this option. The setting is inherit from parent Host Group.
In the host cluster, enter option on the PRO tab

c) Individual host group
By default, system wide monitor will take effect if you did not enable this option. The setting is inherit from parent Host Group.

In the host group, enter option on the PRO tab.

Besides that, you may exclude PRO action from VM level. For example, if VMM is located in the VM, you may want to exclude it. Just select the VM, right click to select Properties and select Setting tab. Tick Exclude ..."

To view the PRO tips, click on PRO tips button on the VMM toolbar. If you see the PRO tips,you can select Implement / Dismiss the PRO tips.