migratepages
TLDR
Migrate pages from one node to another
$ migratepages [pid] [from_node] [to_node]
Migrate all pages to specific node$ migratepages [pid] all [2]
Migrate to closest node$ migratepages [pid] [0] best
SYNOPSIS
migratepages pid from-nodes to-nodes
DESCRIPTION
migratepages moves the physical memory pages of a process from one set of NUMA nodes to another. This is useful for optimizing memory placement on NUMA systems.
The command works on a running process and can migrate pages to improve memory locality.
PARAMETERS
pid
Process ID.from-nodes
Source NUMA nodes (or 'all').to-nodes
Destination NUMA nodes (or 'best').
EXAMPLES
$ # Migrate PID 1234 from node 0 to node 1
migratepages 1234 0 1
# Migrate from all nodes to node 2
migratepages 1234 all 2
# Let kernel choose best destination
migratepages 1234 0 best
migratepages 1234 0 1
# Migrate from all nodes to node 2
migratepages 1234 all 2
# Let kernel choose best destination
migratepages 1234 0 best
CAVEATS
Requires numactl package. Process must be running. Migration can be slow. May require root. Only works on NUMA systems.
HISTORY
migratepages is part of the numactl package, developed for controlling NUMA memory policies on Linux systems.
SEE ALSO
numactl(8), numastat(8), mbind(2), set_mempolicy(2)
