How to adjust the memory allocated to RHEV virtual guest on the fly?

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Issue

Currently in Red Hat Enterprise Virtualization it is necessary to take a guest offline to make any changes to the amount of memory allocated to a guest. Is it possible to adjust the memory allocated to the guest on the fly.
How to Hot add vCPUs and RAM to running VM?

Environment

Red Hat Enterprise Virtualization(RHEV) 3.0 through 3.5

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