[Users] Memory size confusion

[Brad Alexander]

Hi,

I'm running openvz through Proxmox-VE. I have a container (running
Debian/sid) that I am using as my puppet master, and am about to add a
postgres database for puppetdb, so I was reviewing the amount of
memory available to me with an eye toward adjusting it. This is when I
noticed wildly differing numbers from various places.

/proc/user_beancounters says:

      105:  kmemsize                 88549787            120004608
       206116305            226727936                    0
            lockedpages                     0                  548
          262144               262144                    0
            privvmpages                200051               304016
          524288               536788                    0
            shmpages                     1294                 2270
           21504                21504                    0

The proxmox web UI says:

    Memory:   2.00GB
    Swap:       0

But top and free give me different results:

top and free -m:

MiB Mem:   4194303 total,     2976 used,  4191327 free,        0 buffers
MiB Swap:        0 total,        0 used,        0 free,     2395 cached

free:

             total       used       free     shared    buffers     cached
Mem:            -4    3047456   -3047460          0          0    2453204
-/+ buffers/cache:     594252    -594256
Swap:            0          0          0

free -g:"
             total       used       free     shared    buffers     cached
Mem:          4095          2       4093          0          0          2
-/+ buffers/cache:          0       4095
Swap:            0          0          0

So how do I reconcile this and why are the numbers I am getting so
wonky? In essence, which source do I trust?

Thanks,
--b