.Dd May 2026
.Dt FREE 1
.Os
.Sh NAME
.Nm free
.Nd display amount of free and used memory in the system
.Sh SYNOPSIS
.Nm
.Op Fl bghkmpt
.Sh DESCRIPTION
.Nm
displays the total amount of free and used physical and swap memory in the system, as
well as the buffers, caches (including ZFS ARC) and wired memory used by the kernel.
The displayed columns are:
.Bl -tag -width -indent
.It total
Total usable memory.
.It used
Unavailable memory.
.It free
Truly unallocated memory.
.It wired
Memory that can't be swapped to disk.
.It buff/cache
Memory used by kernel buffers, traditional FS cache and ARC.
.It available
Available memory.
.Sh OPTIONS
.Bl -tag -width ".Fl b "
.It Fl b
Display in bytes.
.It Fl k
Display in kibibytes.
.It Fl m
Display in mebibytes.
.It Fl g
Display in gibibytes.
.It Fl t
Display in tebibytes.
.It Fl p
Display in pebytes.
.It Fl h
Display in human-readable units.
.Sh SEE ALSO
.Xr top 1 ,
.Xr sysctl 1