numastat - Print statistics about NUMA memory allocation
numastat displays NUMA allocations statistics from the kernel memory
allocator. Each process has NUMA policies that specifies on which node
pages are allocated. See set_mempolicy(2) or numactl(8) on details of
the available policies. The numastat counters keep track on what nodes
memory is finally allocated.
The counters are separated for each node. Each count event is the
allocation of a page of memory.
numa_hit is the number of allocations where an allocation was intended
for that node and succeeded there.
numa_miss shows how often an allocation was intended for this node, but
ended up on another node due to low memory.
numa_foreign is the number of allocations that were intended for
another node, but ended up on this node. Each numa_foreign event has a
numa_miss on another node.
interleave_hit is the number of interleave policy allocations that were
intended for a specific node and succeeded there.
local_node is incremented when a process running on the node allocated
memory on the same node.
other_node is incremented when a process running on another node
allocated memory on that node.
numactl(8) set_mempolicy(2) numa(3)
numastat output is only available on NUMA systems.
numastat assumes the output terminal has a width of 80 characters and
tries to format the output accordingly.
watch -n1 numastat
watch -n1 --differences=accumulative numastat
The output formatting on machines with a large number of nodes could be