1.1.8 NUMA

Many modern multiprocessors have non-uniform memory access (NUMA) memory designs, where the performance of a process can depend on whether the memory range being accessed is attached to the local CPU or to another CPU. As performance is different depending on memory locality, the operating system should ideally schedule a process to run on the CPU whose memory controller is connected to the memory to be accessed.

  • NUMA balancing enabled.  UEK R5 includes improvements and fixes to NUMA balancing to resolve issues that caused high I/O Wait times when this feature was enabled. NUMA balancing is automatically enabled on systems that have multiple NUMA nodes.