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When troubleshooting a performance related issue, an administrator sees the following warning message on an ESXi Console:
Significant imbalance between NUMA nodes detected. Performance may be impacted.
Which action should the administrator take to correct this problem?
A. Ensure that the RAM modules are evenly balanced between processor sockets in the physical server.
B. Ensure that all memory banks associated with CPU Socket 0 in the physical server are completely filled.
C. Ensure that the physical server has the maximum amount of RAM modules that it can support.
D. Ensure that all RAM modules in the host are Error-correcting code (ECC) modules.
Correct Answer: A
Explanation/Reference:
Explanation:
This message displays when memory is not evenly distributed between processor sockets.
Each CPU socket has its own RAM slots. To resolve this issue, evenly balance RAM modules between processor sockets. That is, ensure that each bank of RAM slots has the same amount of RAM.
For example, if CPU socket 1 has a total of 8 GB of RAM, ensure that CPU socket 2 also has 8 GB of RAM.
Ensure that memory on the nodes are balanced. For more information and assistance, contact your vendor.
Note: Damaged or faulty physical RAM modules can also cause this issue.
Reference:
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1018754
