6.7

Table Of Contents
Prerequisites
Required privileges: Virtual Machine.Configuration.Settings
Verify that the virtual machine is running and is configured as follows.
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Latest version of VMware Tools installed.
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Guest operating system that supports CPU hot plug.
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Virtual machine compatibility is ESX/ESXi 4.x or later.
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Virtual machine is turned off.
Procedure
1 Right-click a virtual machine in the inventory and select Edit Settings.
2 On the Virtual Hardware tab, expand CPU, and select Enable CPU Hot Add.
3 Click OK.
You can now add CPUs even if the virtual machine is turned on.
Change the Number of Virtual CPUs
You can configure a virtual machine that runs on an ESXi host 6.5 and later to have up to 128 CPUs. You
can change the number of virtual CPUs while your virtual machine is powered off. If virtual CPU hotplug is
enabled, you can increase the number of virtual CPUs while the virtual machine is running.
Virtual CPU hot add is supported for virtual machines with multicore CPU support and ESXi 5.0 and later
compatibility. When the virtual machine is turned on, and CPU hot add is enabled, you can hot add virtual
CPUs to the running virtual machine. You can add only multiples of the number of cores per socket.
Important When you configure your virtual machine for multicore virtual CPU settings, you must ensure
that your configuration complies with the requirements of the guest operating system EULA.
Prerequisites
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If CPU hot add is not enabled, turn off the virtual machine before adding virtual CPUs.
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To hot add multicore CPUs, verify that the virtual machine is compatible with ESXi 5.0 and later.
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Verify that you have the Virtual Machine.Configuration.Change CPU Count privilege.
Procedure
1 Right-click a virtual machine in the inventory and select Edit Settings.
2 On the Virtual Hardware tab, expand CPU.
3 From the CPU drop-down menu, select the number of cores.
4 From the Cores Per Socket drop-down menu, select the number of cores per socket and click OK.
vSphere Virtual Machine Administration
VMware, Inc. 90