---
name: "proc_pid_statm"
section: "5"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/proc_pid_statm"
---

# proc\_pid\_statm(5)

memory usage information

## NAME

/proc/pid/statm - memory usage information

## DESCRIPTION

- */proc/*pid*/statm*

  Provides information about memory usage, measured in pages. The columns are:

-

  ```
  size       (1) total program size
             (same as VmSize in /proc/pid/status)
  resident   (2) resident set size
             (inaccurate; same as VmRSS in /proc/pid/status)
  shared     (3) number of resident shared pages
             (i.e., backed by a file)
             (inaccurate; same as RssFile+RssShmem in
             /proc/pid/status)
  text       (4) text (code)
  lib        (5) library (unused since Linux 2.6; always 0)
  data       (6) data + stack
  dt         (7) dirty pages (unused since Linux 2.6; always 0)
  ```

-

  Some of these values are inaccurate because of a kernel-internal scalability optimization. If accurate values are required, use */proc/*pid*/smaps* or */proc/*pid*/smaps\_rollup* instead, which are much slower but provide accurate, detailed information.

## SEE ALSO

[**proc**(5)](/proc/5.md), [**proc\_pid\_status**(5)](/proc_pid_status/5.md)