migratepages

moves the physical memory pages of a process from one set of NUMA

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

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').

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

$
# 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)