pcp-numastat(1) — Linux manual page

PCP-NUMASTAT(1)          General Commands Manual          PCP-NUMASTAT(1)

NAME         top

       pcp-numastat - report on NUMA memory allocation

SYNOPSIS         top

       pcp [pcp options] numastat [-mnV?] [-w width] [-p [process ...]]

DESCRIPTION         top

       pcp-numastat displays NUMA allocation statistics from the kernel
       memory allocator.  Each process has NUMA policies that specify on
       which node pages are allocated.  The performance counters in the
       kernel track on which nodes memory is allocated and these values
       are sampled and reported by pcp-numastat.

       Counters are maintained individually for each NUMA node.  Details
       of the semantics of each reported metric can be retrieved using
       the following command:

            # pminfo ‐dt mem.numa.alloc

OPTIONS         top

       When invoked via the pcp(1) command, the -h/--host, -a/--archive,
       -O/--origin, -Z/--timezone and several other pcp options become
       indirectly available; refer to PCPIntro(1) for a complete
       description of these options.

       The additional command line options available for pcp-numastat
       are:

       -m, --meminfo
            Display meminfo-like system-wide memory usage.

       -n, --numastat
            Display the numastat statistics info.

       -p, --process
            Display per-process NUMA memory usage from proc.numa_maps
            metrics.  Any trailing process operands are treated as
            process IDs (when the operand is all digits) or regular
            expressions for command name matching.  Matching for command
            names is performed against the full command line (as reported
            by proc.psinfo.psargs).  When a single process ID operand is
            provided and it matches exactly one process, a detailed table
            of Hugepage, Heap, Stack and Private mappings is shown (as in
            numastat -p). When multiple process ID operands are provided,
            a per-process summary table is shown (also like numastat -p)
            and may be split into multiple node column blocks based on
            the available display width.

       In the per-process view, node columns are always shown for all
       NUMA nodes present on the system (as reported by PCP NUMA
       inventory metrics), even if individual proc.numa_maps metric
       instances omit some nodes. Missing per-process metrics are
       reported as zero.

       -V, --version
              Display the current version of the command.

       -w width, --width=width
              Limit display to width.

       -?, --help
              Display usage message and exit.

NOTES         top

       pcp-numastat is inspired by the numastat(1) command and produces
       the same output for the system-wide views. The per-process view
       (-p) follows the numastat -p layout.

PCP ENVIRONMENT         top

       Environment variables with the prefix PCP_ are used to
       parameterize the file and directory names used by PCP.  On each
       installation, the file /etc/pcp.conf contains the local values for
       these variables.  The $PCP_CONF variable may be used to specify an
       alternative configuration file, as described in pcp.conf(5).

       For environment variables affecting PCP tools, see
       pmGetOptions(3).

SEE ALSO         top

       PCPIntro(1), pcp(1) and numastat(1).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨http://www.pcp.io/⟩.  If you have a bug report for this manual
       page, send it to pcp@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2026-05-24.
       (At that time, the date of the most recent commit that was found
       in the repository was 2026-05-24.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Performance Co-Pilot               PCP                    PCP-NUMASTAT(1)

Pages that refer to this page: pcp(1)

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