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Non-uniform memory access Wikipedia. Non-uniform memory access is a computer memory design used in multiprocessing, where the memory access time depends on the memory location relative to the processor. Under NUMA, a processor can access its own local memory faster than non-local memory. The benefits of NUMA are limited to particular workloads, notably on servers where the data is often associated.

Non-uniform memory access Wikipedia
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In a NUMA system, CPUs are arranged in smaller systems called nodes. Each node has its own processors and memory, and is connected to the larger system through a cache-coherent interconnect bus. The system attempts to improve performance by scheduling threads on processors that are in the same node as the memory being used.