free

Command Function

This command is used to display the memory usage in the system.

Syntax

free [-b | -k | -m | -g | -t]

Parameters

Table 1 Parameter description

Parameter	Description
No parameter	Displays the memory usage in bytes.
--help/-h	Displays the parameters supported by the free command.
-b	Displays the memory usage in bytes.
-k	Display the memory waterline in KiB.
-m	Display the memory waterline in MiB.
-g	Displays the memory usage in GiB.
-t	Displays the memory usage in TiB.

Usage Guidelines

None.

Example

Run free, free -k, and free -m, respectively.

Output

OHOS:/$ free
                total        used        free      shared     buffers
Mem:          2819652     2754468       65184           0           0
-/+ buffers/cache:        2754468       65184
Swap:               0           0           0
OHOS:/$ free -k
                total        used        free      shared     buffers
Mem:             2753        2692          60           0           0
-/+ buffers/cache:           2692          60
Swap:               0           0           0
OHOS:/$ free -m
                total        used        free      shared     buffers
Mem:                2           2           0           0           0
-/+ buffers/cache:              2           0
Swap:               0           0           0

Table 2 Output description

Parameter	Description
total	Total size of the dynamic memory pool.
used	Size of the used memory.
free	Size of the unallocated memory.
shared	Size of the shared memory.
buffers	Size of the buffer.