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Adding virtual cores to VCPUs to XenServer VM

reference: http://support.citrix.com/article/CTX126524/



go to xencenter, shut down VM. add another VCPU, then do the following...

Get the UUID using the following command

xe vm-list name-label=<Name of the VM>

Set the number of cores per processor using the following command

xe vm-param-set platform:cores-per-socket=’4’ uuid=<VM UUID from Step1>

Set the number of VCPU’s at startup with the following command

xe vm-param-set VCPUs-at-startup='2' uuid=<VM-UUID>     note: this value may need to be 1 for the first go around with these commands.

Finally, Set the number of max cores with the following command

xe vm-param-set VCPUs-max='4'

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