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NAME

       /proc/pid/status - memory usage and status information

DESCRIPTION

       /proc/pid/status
              Provides  much of the information in /proc/pid/stat and /proc/pid/statm in a format
              that's easier for humans to parse.  Here's an example:

                  $ cat /proc/$$/status
                  Name:   bash
                  Umask:  0022
                  State:  S (sleeping)
                  Tgid:   17248
                  Ngid:   0
                  Pid:    17248
                  PPid:   17200
                  TracerPid:      0
                  Uid:    1000    1000    1000    1000
                  Gid:    100     100     100     100
                  FDSize: 256
                  Groups: 16 33 100
                  NStgid: 17248
                  NSpid:  17248
                  NSpgid: 17248
                  NSsid:  17200
                  VmPeak:     131168 kB
                  VmSize:     131168 kB
                  VmLck:           0 kB
                  VmPin:           0 kB
                  VmHWM:       13484 kB
                  VmRSS:       13484 kB
                  RssAnon:     10264 kB
                  RssFile:      3220 kB
                  RssShmem:        0 kB
                  VmData:      10332 kB
                  VmStk:         136 kB
                  VmExe:         992 kB
                  VmLib:        2104 kB
                  VmPTE:          76 kB
                  VmPMD:          12 kB
                  VmSwap:          0 kB
                  HugetlbPages:          0 kB        # 4.4
                  CoreDumping:   0                       # 4.15
                  Threads:        1
                  SigQ:   0/3067
                  SigPnd: 0000000000000000
                  ShdPnd: 0000000000000000
                  SigBlk: 0000000000010000
                  SigIgn: 0000000000384004
                  SigCgt: 000000004b813efb
                  CapInh: 0000000000000000
                  CapPrm: 0000000000000000
                  CapEff: 0000000000000000
                  CapBnd: ffffffffffffffff
                  CapAmb:   0000000000000000
                  NoNewPrivs:     0
                  Seccomp:        0
                  Seccomp_filters:        0
                  Speculation_Store_Bypass:       vulnerable
                  Cpus_allowed:   00000001
                  Cpus_allowed_list:      0
                  Mems_allowed:   1
                  Mems_allowed_list:      0
                  voluntary_ctxt_switches:        150
                  nonvoluntary_ctxt_switches:     545

              The fields are as follows:

              Name   Command run  by  this  process.   Strings  longer  than  TASK_COMM_LEN  (16)
                     characters (including the terminating null byte) are silently truncated.

              Umask  Process umask, expressed in octal with a leading zero; see umask(2).  (Since
                     Linux 4.7.)

              State  Current state of the process.  One of  "R  (running)",  "S  (sleeping)",  "D
                     (disk  sleep)",  "T  (stopped)",  "t  (tracing  stop)",  "Z (zombie)", or "X
                     (dead)".

              Tgid   Thread group ID (i.e., Process ID).

              Ngid   NUMA group ID (0 if none; since Linux 3.13).

              Pid    Thread ID (see gettid(2)).

              PPid   PID of parent process.

              TracerPid
                     PID of process tracing this process (0 if not being traced).

              Uid
              Gid    Real, effective, saved set, and filesystem UIDs (GIDs).

              FDSize Number of file descriptor slots currently allocated.

              Groups Supplementary group list.

              NStgid Thread group ID (i.e., PID) in each of the PID namespaces of which pid is  a
                     member.   The  leftmost  entry  shows  the  value  with  respect  to the PID
                     namespace of the process that mounted this procfs (or the root namespace  if
                     mounted  by  the kernel), followed by the value in successively nested inner
                     namespaces.  (Since Linux 4.1.)

              NSpid  Thread ID in each of the PID namespaces of  which  pid  is  a  member.   The
                     fields are ordered as for NStgid.  (Since Linux 4.1.)

              NSpgid Process  group  ID  in  each of the PID namespaces of which pid is a member.
                     The fields are ordered as for NStgid.  (Since Linux 4.1.)

              NSsid  descendant namespace session ID hierarchy Session ID  in  each  of  the  PID
                     namespaces  of which pid is a member.  The fields are ordered as for NStgid.
                     (Since Linux 4.1.)

              VmPeak Peak virtual memory size.

              VmSize Virtual memory size.

              VmLck  Locked memory size (see mlock(2)).

              VmPin  Pinned memory size (since Linux 3.2).  These are pages that can't  be  moved
                     because something needs to directly access physical memory.

              VmHWM  Peak  resident  set size ("high water mark").  This value is inaccurate; see
                     /proc/pid/statm above.

              VmRSS  Resident set size.  Note that the value here is the sum of RssAnon, RssFile,
                     and RssShmem.  This value is inaccurate; see /proc/pid/statm above.

              RssAnon
                     Size  of  resident  anonymous  memory.   (since  Linux  4.5).  This value is
                     inaccurate; see /proc/pid/statm above.

              RssFile
                     Size  of  resident  file  mappings.   (since  Linux  4.5).   This  value  is
                     inaccurate; see /proc/pid/statm above.

              RssShmem
                     Size  of  resident  shared memory (includes System V shared memory, mappings
                     from tmpfs(5), and shared anonymous mappings).  (since Linux 4.5).

              VmData
              VmStk
              VmExe  Size of data, stack, and text  segments.   This  value  is  inaccurate;  see
                     /proc/pid/statm above.

              VmLib  Shared library code size.

              VmPTE  Page table entries size (since Linux 2.6.10).

              VmPMD  Size  of  second-level  page  tables  (added  in Linux 4.0; removed in Linux
                     4.15).

              VmSwap Swapped-out virtual memory size by anonymous private pages; shmem swap usage
                     is  not  included  (since  Linux  2.6.34).   This  value  is inaccurate; see
                     /proc/pid/statm above.

              HugetlbPages
                     Size of hugetlb memory portions (since Linux 4.4).

              CoreDumping
                     Contains the value 1 if the process is currently dumping core, and 0  if  it
                     is  not  (since  Linux  4.15).  This information can be used by a monitoring
                     process to avoid killing a process that is  currently  dumping  core,  which
                     could result in a corrupted core dump file.

              Threads
                     Number of threads in process containing this thread.

              SigQ   This  field  contains  two  slash-separated  numbers  that  relate to queued
                     signals for the real user ID of this process.  The first  of  these  is  the
                     number  of currently queued signals for this real user ID, and the second is
                     the resource limit on the number of queued signals for this process (see the
                     description of RLIMIT_SIGPENDING in getrlimit(2)).

              SigPnd
              ShdPnd Mask  (expressed  in  hexadecimal)  of  signals  pending  for thread and for
                     process as a whole (see pthreads(7) and signal(7)).

              SigBlk
              SigIgn
              SigCgt Masks (expressed in hexadecimal) indicating signals being blocked,  ignored,
                     and caught (see signal(7)).

              CapInh
              CapPrm
              CapEff Masks  (expressed  in  hexadecimal)  of capabilities enabled in inheritable,
                     permitted, and effective sets (see capabilities(7)).

              CapBnd Capability bounding set, expressed in hexadecimal (since Linux  2.6.26,  see
                     capabilities(7)).

              CapAmb Ambient  capability  set,  expressed  in  hexadecimal  (since Linux 4.3, see
                     capabilities(7)).

              NoNewPrivs
                     Value of the no_new_privs bit (since Linux 4.10, see prctl(2)).

              Seccomp
                     Seccomp mode of the process (since Linux  3.8,  see  seccomp(2)).   0  means
                     SECCOMP_MODE_DISABLED;     1     means    SECCOMP_MODE_STRICT;    2    means
                     SECCOMP_MODE_FILTER.  This field is provided only if the  kernel  was  built
                     with the CONFIG_SECCOMP kernel configuration option enabled.

              Seccomp_filters
                     Number  of  seccomp  filters  attached  to the process (since Linux 5.9, see
                     seccomp(2)).

              Speculation_Store_Bypass
                     Speculation flaw mitigation state (since Linux 4.17, see prctl(2)).

              Cpus_allowed
                     Hexadecimal mask of CPUs on which this process may run (since Linux  2.6.24,
                     see cpuset(7)).

              Cpus_allowed_list
                     Same as previous, but in "list format" (since Linux 2.6.26, see cpuset(7)).

              Mems_allowed
                     Mask  of  memory  nodes  allowed  to  this  process (since Linux 2.6.24, see
                     cpuset(7)).

              Mems_allowed_list
                     Same as previous, but in "list format" (since Linux 2.6.26, see cpuset(7)).

              voluntary_ctxt_switches
              nonvoluntary_ctxt_switches
                     Number of voluntary and involuntary context switches (since Linux 2.6.23).

SEE ALSO

       proc(5)