How the undersized and over-sized VM found

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URL : http:////docs.vmware.com/en/vRealize-Operations-Manager/6.7/com.vmware.vcom.core.doc/GUID-738F2864-B...

Topic Name : Optimize Performance Dashboard

Publication Name : vRealize Operations Manager 6.7 Help

Product/Version : vRealize Operations Manager/6.7

Question :

How much duration and how frequently the data is captured if using default vRO policy? Is it average? Is it also considering peaks? Where can I see policy for undersized and over-sized VM calculation?

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Recommended size is generated from the capacity engine and is based on all of the data it has processed.

Right-sizing recommendations are limited to at most +50% or -50% change from current size i.e. a VM which has 12 vCPU today could be recommended to go as low as 6 vCPU but not lower, or as high as 18 vCPU but not higher. (Of course it could also be recommended to go to 8 vCPU or 14 vCPU)

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