- Connect to the vCenter Server using either the vSphere Web or vSphere Client.
- Select an ESXi host in the inventory.
- Click the Manage (5.5/6.0) or Configure (6.5/6.7) tab.
- Click the Settings sub-tab.
- Under the System heading, click Advanced System Settings.
- Click in the Filter box and search VMkernel.Boot.hyperthreadingMitigation
- Select the setting by name and click the Edit pencil icon.
- Change the configuration option to true (default: false).
- Click OK.
- Reboot the ESXi host for the configuration change to go into effect.
Solve the Issue from CLI:
- Connect to the host using SSH
- Check the current runtime value of the HTAware Mitigation Setting by running: esxcli system settings kernel list -o hyperthreadingMitigation
- Enable HT Aware Mitigation by running: esxcli system settings kernel set -s hyperthreadingMitigation -v TRUE
- Reboot the ESXi Host.
Official Link: https://kb.vmware.com/s/article/55806
