#StackBounty: #monitoring #virtual-machines #docker #graphite VM CPU usage at 100%

Bounty: 100

CPU usage on our metrics box is at 100% intermittently causing:
‘Internal server error’ when rendering Grafana dashboards

The only application running on our machine is Docker with 3 subcontainers

  • cadvisor
  • graphite

  • grafana

Machine spec
OS Version Ubuntu 16.04 LTS
Release 16.04 (xenial)
Kernel Version 4.4.0-103-generic
Docker Version 17.09.0-ce
CPU 4 cores
Memory 4096 MB
Memory reservation is unlimited
Network adapter mgnt

Driver overlay2
Backing Filesystem extfs
Supports d_type true
Native Overlay Diff true

Memory swap limit is 2.00GB

Here is a snippet from cAdvisor:

enter image description here

The kworker and ksoftirqd processes change status constently from ‘D’ to ‘R’ to ‘S’

Are the machine specs correct for this setup?
How can I get the CPU usage to ‘normal’ levels?


After increasing memory from 4GB to 8GB the CPU usage gradually increased:
enter image description here

Get this bounty!!!