Summery
Linuxサーバーのメモリー使用状況の表示Construction
$ free [option]
Option
-b, --bytes show output in bytes -k, --kilo show output in kilobytes -m, --mega show output in megabytes -g, --giga show output in gigabytes --tera show output in terabytes -h, --human show human-readable output --si use powers of 1000 not 1024 -l, --lohi show detailed low and high memory statistics -o, --old use old format (without -/+buffers/cache line) -t, --total show total for RAM + swap -s N, --seconds N repeat printing every N seconds -c N, --count N repeat printing N times, then exit --help display this help and exit -V, --version output version information and exit
Sample
$ free
total used free shared buffers cached
Mem: 8185996 7601836 584160 58732 226704 6653808
-/+ buffers/cache: 721324 7464672
Swap: 8262652 126548 8136104
Discription
NAME
free - Display amount of free and used memory in the system
SYNOPSIS
free [options]
DESCRIPTION
free displays the total amount of free and used physical and swap memory in the system, as
well as the buffers used by the kernel. The shared memory column represents either the
MemShared value (2.4 series kernels) or the Shmem value (2.6 series kernels and later) taken
from the /proc/meminfo file. The value is zero if none of the entries is exported by the
kernel.
OPTIONS
-b, --bytes
Display the amount of memory in bytes.
-k, --kilo
Display the amount of memory in kilobytes. This is the default.
-m, --mega
Display the amount of memory in megabytes.
-g, --giga
Display the amount of memory in gigabytes.
--tera Display the amount of memory in terabytes.
-h, --human
Show all output fields automatically scaled to shortest three digit unit and display
the units of print out. Following units are used.
B = bytes
K = kilos
M = megas
G = gigas
T = teras
If unit is missing, and you have petabyte of RAM or swap, the number is in terabytes
and columns might not be aligned with header.
-c, --count count
Display the result count times. Requires the -s option.
-l, --lohi
Show detailed low and high memory statistics.
-o, --old
Display the output in old format, the only difference being this option will disable
the display of the "buffer adjusted" line.
-s, --seconds seconds
Continuously display the result delay seconds apart. You may actually specify any
floating point number for delay, usleep(3) is used for microsecond resolution delay
times.
--si Use power of 1000 not 1024.
-t, --total
Display a line showing the column totals.
--help Print help.
-V, --version
Display version information.
FILES
/proc/meminfo
memory information
SEE ALSO
ps(1), slabtop(1), top(1), vmstat(8).
AUTHORS
Written by Brian Edmonds.
REPORTING BUGS
Please send bug reports to ⟨procps@freelists.org⟩
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