PCP-FREE(1)                General Commands Manual               PCP-FREE(1)

NAME         top

       pcp-free - report on free and used memory in the system

SYNOPSIS         top

       pcp [pcp options] free [-bkmgoltV] [-c count] [-s interval]

DESCRIPTION         top

       pcp-free gives a summary display of the total amount of free and used
       physical memory and swap in the system, as well as the caches used by
       the kernel.

       When invoked via the pcp(1) command, the -h/--host, -a/--archive,
       -O/--origin, -s/--samples, -t/--interval, -Z/--timezone and several
       other pcp options become indirectly available.

       The -b/--bytes switch displays the amount of memory in bytes; the
       -k/--kilobytes switch (set by default) displays it in kilobytes; the
       -m/--megabytes switch displays it in megabytes.

       The -t/--total switch displays a line containing the totals.

       The -o switch disables the display of a "buffer adjusted" line.  If
       the -o option is not specified, free subtracts buffer memory from the
       used memory and adds it to the free memory reported.

       The -s/--interval switch activates continuous polling delay seconds
       apart.  You may specify any floating point number for delay, or
       indeed any valid pmParseInterval(3) specification, which includes
       microsecond resolution delay times.  This can be used in conjunction
       with the -c/--samples option to terminate the display after count

       The -l switch shows detailed low and high memory statistics.

       The current version of pcp-free can be queried using the -V/--version

NOTES         top

       pcp-free is inspired by the free(1) command and aims to be command
       line and output compatible with it.

       The shared memory column should be ignored; it is obsolete.

SEE ALSO         top

       pcp(1), free(1), PCPIntro(1), pmParseInterval(3) and environ(7).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2018-10-29.  (At that time, the date of the most recent commit that
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       (which is not part of the original manual page), send a mail to

Performance Co-Pilot                 PCP                         PCP-FREE(1)

Pages that refer to this page: pcp(1)