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proc_pid_statm

Section: File Formats (5)
Updated: 202-0-08
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/proc/pid/statm - memory usage information

/proc/pid/statm: Provides information about memory usage, measured in pages. The columns are:
: size (1) total program size
           (same as VmSize in I]/proc/]pidI]/status]) resident (2) resident set size
           (inaccurate; same as VmRSS in I]/proc/]pidI]/status]) shared (3) number of resident shared pages
           (i.e., backed by a file)
           (inaccurate; same as RssFile+RssShmem in
           I]/proc/]pidI]/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 kerne-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.