Non-NUMA memory setting is not supported - IBM System x3750 M4 and Flex System x440 Compute Node

Troubleshooting

Problem

The Unified Extensible Firmware Interface (UEFI) Setup utility contains a memory setting named Socket Interleave, with possible values of 'Non-Uniform Memory Access (NUMA)' and 'Non-NUMA'. The default value is 'NUMA'.

Resolving The Problem

Source

RETAIN tip: H206057

Symptom

The Unified Extensible Firmware Interface (UEFI) Setup utility contains a memory setting named Socket Interleave, with possible values of 'Non-Uniform Memory Access (NUMA)' and 'Non-NUMA'. The default value is 'NUMA'.

Affected configurations

The system can be any of the following IBM servers:

Flex System x440 Compute Node, Type 7917, any model
System x3750 M4, type 8722, any model
System x3750 M4, type 8733, any model

This tip is not software specific.

This tip is not option specific.

The system has the symptom described above.

Solution

This is a permanent restriction. Intel does not support the Socket Interleave memory setting of 'Non-NUMA' on Xeon Processor E5-4600 product families (EP-4S), which are used in the IBM System x3750 M4 and IBM Flex System x440 Compute Node.

Workaround

Do not configure the IBM System x3750 M4 and IBM Flex System x440 Compute Node to use the Socket Interleave memory setting of 'Non-NUMA'.

Additional information

Intel does not currently support the Socket Interleave memory setting of 'Non-NUMA' on the Intel Xeon Processor E5-4600 product families (EP-4S).

Users should be made aware that Intel does not support the Socket Interleave memory setting of 'Non-NUMA' on Intel Xeon Processor E5-4600 product families (EP-4S), which are in the IBM System x3750 M4 and IBM Flex System x440 Compute Nodes.

At this time, do not change the default UEFI Socket Interleave memory setting from 'NUMA' to 'Non-NUMA'.

Document Location

Worldwide

Operating System

System x:Operating system independent / None

PureFlex System and Flex System:Operating system independent / None

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