Understanding memory graphs

Archive Rancher 1.x
1

Hi,
I’ve got to different rancher nodes, one running ubuntu 16.04 LTS and docker 1.11.1 and the other is a rancherOS 0.4.5 docker 1.10.3.
Both running the same apps.

ubuntu is showing used memory as 3.13GB and rancherOS is showing 1.86GB (both having mem=4GB).

How am I supposed to interpret this info?

Maybe related,
none of the apps are showing stats info on ubuntu hosts…

br hw

2

Our integration with cAdvisor doesn’t work with Docker 1.11 + systemd (16.04).

Grab cat /proc/meminfo from both?

3

Hi @vincent,
ubuntu:
MemTotal: 4046660 kB
MemFree: 1818860 kB
MemAvailable: 3748152 kB
Buffers: 37908 kB
Cached: 1848984 kB
SwapCached: 0 kB
Active: 981032 kB
Inactive: 1096768 kB
Active(anon): 194000 kB
Inactive(anon): 5292 kB
Active(file): 787032 kB
Inactive(file): 1091476 kB
Unevictable: 3660 kB
Mlocked: 3660 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 44 kB
Writeback: 0 kB
AnonPages: 194568 kB
Mapped: 120520 kB
Shmem: 5960 kB
Slab: 101980 kB
SReclaimable: 80520 kB
SUnreclaim: 21460 kB
KernelStack: 5184 kB
PageTables: 5460 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 2023328 kB
Committed_AS: 1314888 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 104448 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 79744 kB
DirectMap2M: 4114432 kB
DirectMap1G: 2097152 kB

RancherOS:
MemTotal: 4050768 kB
MemFree: 1813736 kB
MemAvailable: 3767328 kB
Buffers: 194964 kB
Cached: 1473524 kB
SwapCached: 0 kB
Active: 816372 kB
Inactive: 1051560 kB
Active(anon): 211244 kB
Inactive(anon): 240 kB
Active(file): 605128 kB
Inactive(file): 1051320 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 40 kB
Writeback: 0 kB
AnonPages: 199480 kB
Mapped: 113228 kB
Shmem: 12036 kB
Slab: 344620 kB
SReclaimable: 326892 kB
SUnreclaim: 17728 kB
KernelStack: 3872 kB
PageTables: 3740 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 2025384 kB
Committed_AS: 1468328 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 9544 kB
VmallocChunk: 34359726756 kB
HardwareCorrupted: 0 kB
AnonHugePages: 100352 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 61312 kB
DirectMap2M: 4132864 kB

ubuntu memory graph: 1.99BB
rancherOS memory graph: 1.02GB

/hw