Home > Workload Solutions > SAP > Guides > SAP HANA HCI Guides > SAP HANA Deployments on Dell PowerFlex Hyperconverged Infrastructure > CPU and memory
Use SAP and VMware sizing guidelines to size CPU and memory requirements for the SAP HANA VMs. For more information, see SAP HANA sizing considerations. Overcommitment of CPU and memory resources is not permitted.
The SAP HANA HCI certification for PowerFlex systems includes support for half-socket and full-socket SAP HANA VMs. The differences are as follows:
Because CPU socket 0 (the first NUMA node) is reserved for the PowerFlex SVM, the remaining CPU sockets can be used for SAP HANA VMs. To prevent the SAP VMs from running on CPU 0, add the numa.nodeAffinity parameter to the configuration of the SAP HANA production VMs.
To add this parameter for each SAP HANA production VM:
Note: When assigning memory to a production SAP HANA VM, select the Reserve all guest memory (All locked) box.