Linux Man Page Viewer
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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 allo-
cation 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 allo-
cated 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