Allow oversubscription of compute resources for a test environment

For a test platform, you may wish to allow users to work with more compute resources than are present in your servers.

To allow oversubscription for a test platform, create compute load level rules for CPU and RAM for each server.

We do not recommend the use of oversubscription for a production environment. The platform allocates the resources to the virtualization technology, but the virtualization technology is responsible for managing the resources. Always consult the virtualization provider's documentation to determine safe values for your environment, for example, https://kb.vmware.com/s/article/1003497

To create a load level compute rule:

Privileges: Access infrastructure view and Private DCs, View datacenter details, Manage allocation rules

Go to Infrastructure → Private → select a datacenter
If you are in Map view or Statistics view, click the Server symbol in top right-hand corner to go to Servers view
Go to Allocation rules
On the Global panel, click the + add button
Select the "Load level compute" rule type

Complete the dialog, selecting the server and setting values above 100% for CPU and for RAM

Click here to display details of add a new rule load level compute

Field	Value
Rule type	Select Load level compute
Rack	Select All or a specific rack
Server	Select All or a specific server. If you are using a cluster as a physical machine, select the "Server" radio button to create rules for the cluster
Cluster	If you are using vCenter with ESXi, the platform detects the clusters. Select a specific cluster A cluster rule affects all hosts irrespective of their state, for example, it applies to hosts that are powered off.
Aggregate	Select to create a rule for the sum of all resources in a group (datacenters, racks, or clusters). This means that the platform will sum all of the resources in the group and calculate the load level percentage of the total in order to determine the available resources for the group.
Service Port	The port used by the cloud nodes to connect to the storage technology
RAM	Percentage usage of memory to allow. We DO NOT recommend the overallocation of RAM
CPU cores	Percentage usage of CPU cores to allow. We DO NOT recommend the oversubscription of CPU cores