9.8.3. Hot plugging CPUs on a virtual machine

Procedure

1. Navigate to Virtualization VirtualMachines.
2. Select the required VM to open the VirtualMachine details page.
3. On the Configuration tab, click Edit CPU|Memory.
4. Select the vCPU radio button.

5. Enter the required number of vCPU sockets and click Save.

   참고

   By hot plugging, you can increase the total number of vCPU sockets of a VM up to four times the default initial number. Exceeding this limit requires a restart.

   If the VM is migratable, a live migration is triggered. If not, or if the changes cannot be live-updated, a RestartRequired condition is added to the VM.

   참고

   If a VM has the spec.template.spec.domain.devices.networkInterfaceMultiQueue field enabled and CPUs are hot plugged, the following behavior occurs:

   • Existing network interfaces that you attach before the CPU hot plug retain their original queue count, even after you add more virtual CPUs (vCPUs). The underlying virtualization technology causes this expected behavior.
   • To update the queue count of existing interfaces to match the new vCPU configuration, you can restart the VM. A restart is only necessary if the update improves performance.
   • New VirtIO network interfaces that you hot plugged after the CPU hot plug automatically receive a queue count that matches the updated vCPU configuration.