Re: PCP 3.10.5

[henry c <hc3249@xxxxxxxxx>]

Nathan,

Thanks for the response.

For me at least, the numbers are not matching.

CONTAINER IDÂ Â Â Â IMAGE Â Â Â Â Â Â Â COMMANDÂ Â Â Â Â Â Â Â CREATED Â Â Â Â Â Â STATUSÂ Â Â Â Â Â Â PORTS Â Â Â Â Â Â Â NAMES

5a86bb5685bc    fbe679c040d6    "/bin/sh -c '/usr/lo  2 weeks ago     Up 2 weeks               serene_pike

host:/sys/fs/cgroup/memory/docker/5a86bb5685bcfc87159f2578079703efc172c662ac9702757f1829b53d15d8f6#Âcat memory.max_usage_in_bytes

1822720

and calling the api returns this, with all instance having the same value

    {

      "pmid": 12629073,

      "name": "cgroup.memory.limit",

      "instances": [

        {

          "instance": 0,

          "value": 18446744073709552000

        },

        {

Thanks,

-Henry

On Thu, Apr 30, 2015 at 4:09 PM, Nathan Scott <nathans@xxxxxxxxxx> wrote:

Hi there Henry,

(CC'ing the PCP list in case others come across this phenomenon too)

----- Original Message -----
> Hey Nathan,
>
> Thanks for the quick response!
>
> I was able to install the new code, and get data from those 3 new metrics.
>
> However the cgroup.memory.limit looks weird to me, i dont think this is in
> bit or bytes since it would be too large.

Thanks for trying it out! These values are sourced from the kernel via the
cgroup pseudo-filesystem, and we pass back (unmodified) the contents of the
statistics files for each cgroup.

You should be able to find these files and check what limits/usage the kernel
is applying. For cgroups that are used in Docker containers, you should see
things like:

$ cat /sys/fs/cgroup/memory/system.slice/docker-c4f1a5c72ee11e819c1560b6a3be752d3dd6486f84df8322647ad96a184f1f4d.scope/memory.max_usage_in_bytes
14336000
$ cat /sys/fs/cgroup/memory/system.slice/docker-c4f1a5c72ee11e819c1560b6a3be752d3dd6486f84df8322647ad96a184f1f4d.scope/memory.usage_in_bytes
528384

$ docker ps | grep c4f1a5c72ee
c4f1a5c72ee1    fedora:20     Â"/bin/bash"    Â18 hours ago    Up 18 hours              Âjovial_galileo

$ pminfo --fetch --container=jovial_galileo cgroup.memory.usage

cgroup.memory.usage
  inst [0 or "/system.slice/docker-c4f1a5c72ee11e819c1560b6a3be752d3dd6486f84df8322647ad96a184f1f4d.scope"] value 528384


cheers.

--
Nathan