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Description of problem:

Output of #docker stats is showing the MEM USAGE combined with the page cache.

Version-Release number of selected component (if applicable):

Red Hat Enterprise Linux 7.2
docker-1.12.6-32.git88a4867.el7.x86_64

How reproducible:

Upstream https://github.com/moby/moby/issues/10824 can be followed for reproducing the issue.

Actual results:

MEM USAGE along with the PAGE CACHE 

Expected results:

Should have displayed the exact MEM USAGE by subtracting the PAGE CACHE

Additional info:
https://github.com/moby/moby/pull/32777 suggests the fix

Backported in 1.12.6, 1.13.1 and 1.13.1-rhel

Can this be of any help ?

https://github.com/docker/cli/pull/80

In docker-1.12.6-55.gitc4618fb.el7.x86_64, it should be the right result

# free -h
              total        used        free      shared  buff/cache   available
Mem:           992M        168M         93M         49M        730M        549M
Swap:          2.0G         35M        2.0G


# docker stats --no-stream e2cdbdad43d3 
CONTAINER           CPU %               MEM USAGE / LIMIT     MEM %               NET I/O             BLOCK I/O           PIDS
e2cdbdad43d3        0.00%               388 KiB / 992.6 MiB   0.04%               1.296 kB / 648 B    90.11 kB / 0 B      1

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:2599