running 2 vm or more on a low-end server with VMware ESXi 3.5

Error: “Could not power on VM: Admission check failed for memory resource”
Go to Configuration system resource allocation > Click on advanced > Find the VIM object and change the reservation from 512 MB to 192 MB.
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Error: “Could not power on VM: Admission check failed for cpu resource”

On each virtual machines go to edit settings > Resources Tab. set CPU with a reservation of 0Mhz, and verify that Advanced CPU had Hyperthreaded Cored Shared Mode set to Any.