Ways to view the amount of memory in the execution process in a Linux system

In Linux, to see if a process is consuming memory, execute the following command to replace the [PID] with the corresponding process's PID number:

The code is as follows:

Cat/proc/[pid]/status

Description

In addition to memory information, the information stored in the/proc/[pid]/status includes process IDs, signals, and so on, which only describes memory-related information temporarily.

Field description

Peak of virtual memory used by the Vmpeak process

The size of the virtual memory currently used by the vmsize process

The size of the physical memory that the VMLCK has locked (the locked physical memory cannot be swapped to the hard drive)

Peak of physical memory used by the VMHWM process

The size of the physical memory currently used by the VMRSS process

The size of the data segment that the Vmdata process occupies

The stack size that the VMSTK process occupies

The size of the code segment that the Vmexe process occupies (excluding libraries)

The amount of memory consumed by the dynamic libraries loaded by the VMLIB process (which may be shared with other processes)

Page table size occupied by the VMPTE process (number of exchange table entries)

The size of the swap area used by the Vmswap process

Example

Displays the memory information for the process cron, gets the process ID via pidof cron, or through Ps-aux | grep cron lookup Process ID.
The code is as follows:

$ cat/proc/1161/status

Name:cron

State:s (sleeping)

tgid:1161

ngid:0

pid:1161

Ppid:1

tracerpid:0

uid:0 0 0 0

gid:0 0 0 0

Fdsize:64

groups:0

vmpeak:23792 KB

vmsize:23656 KB

vmlck:0 KB

vmpin:0 KB

vmhwm:1040 KB

vmrss:1004 KB

vmdata:260 KB

vmstk:136 KB

Vmexe:40 KB

vmlib:2668 KB

vmpte:72 KB

vmswap:0 KB

Threads:1

sigq:0/15442

sigpnd:0000000000000000

shdpnd:0000000000000000

sigblk:0000000000000000

sigign:0000000000000000

sigcgt:0000000000010001

capinh:0000000000000000

Capprm:0000001fffffffff

Capeff:0000001fffffffff

Capbnd:0000001fffffffff

seccomp:0

Cpus_allowed:3

Cpus_allowed_list:0-1

mems_allowed:00000000,00000001

mems_allowed_list:0

voluntary_ctxt_switches:151

nonvoluntary_ctxt_switches:0