Description

HCI uses virtualization technology to achieve overcommitment and multiplexing of CPU resources. However, suppose the overcommitment is too high. In that case, the configurable resources increase, and the actual usable resources do not increase. This may lead to virtual machine resource preemption, resulting in the virtual machine not functioning properly. In regular operation, you can set the CPU overcommitment limit to avoid the impact on the platform virtual machine due to excessive overcommitment. In the new scenario, the default overcommitment ratio is 200%. The default overcommitment ratio is unlimited.

Precautions

1. There are two types of CPU overcommitment: 100% to 500% and unlimited.
2. The virtual machine will not function properly when the actual CPU usage exceeds the computing CPU capacity.
3. When the actual configuration CPU of the running virtual machine exceeds the configurable CPU, the virtual machine will be unable to power on.
4. The larger the CPU overcommitment ratio, the more virtual machines can start. If the ratio is too high, the virtual machine may have latency. Please set it carefully. It is not recommended to enable CPU overcommitment in core business scenarios.

Prerequisites

None.

Steps

1. Navigate to System > Cluster Settings > CPU Overcommitment Settings.

2. Configure CPU overcommitment.