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Dell PowerFlex Appliance with PowerFlex 4.x Administration Guide

Setting the vNUMA advanced option

Use this task to set numa.vcpu.maxPerVirtualNode value to half the vCPUs assigned to the SVM.

About this task

For example, if the SVM for an MG pool has 20 vCPUs, set numa.vcpu.maxPerVirtualNode=10. If the SVM for an FG pool has 24 vCPUs, set numa.vcpu.maxPerVirtualNode = 12.

Prerequisites

Ensure the CPU hot plug feature is disabled, in case it is enabled disable it before configuring vNUMA parameter:

  1. Log in to the VMware vCenter vSphere client.
  2. Right-click the VM that you want to change and select Edit Settings.
  3. Under the Virtual Hardware tab, expand CPU, and verify the CPU Hot Plug option is cleared.

Steps

  1. Click the VM Options tab and expand Advanced.
  2. Under Configuration Parameters, click Edit Configuration.
  3. Click Add Configuration Parameters.
    For example, if the SVM for an MG pool has 20 vCPUs, set numa.vcpu.maxPerVirtualNode=10. If the SVM for an FG pool has 24 vCPUs, set numa.vcpu.maxPerVirtualNode = 12.
  4. Click OK.
  5. Click Virtual Hardware.
  6. Ensure the following:
    1. Under CPU, Shares are set to High.
    2. Fifty percent of the vCPUs is reserved on the SVM. For example, if the SVM for an MG pool is configured with 20 vCPUs and CPU speed is 2.8 GHz, set a reservation of 28 GHz (20x2.8/2). If the SVM for an FG pool is configured with 24 vCPUs and CPU speed is 3 GHz, set a reservation of 36 GHz (24x3/2).
  7. Click OK.

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