What is NUMA?

Non-Uniform Memory Access (NUMA) 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 (memory associated with another processor). NUMA architectures are used to improve performance, particularly for servers and high-performance computing, by reducing memory access latencies. It is commonly used in multi-socket systems where each socket has its own dedicated memory.