CPU usage on our metrics box is at 100% intermittently causing
‘Internal server error’ when rendering 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\
Storage
Driver → overlay2
Backing Filesystem → extfs
Supports d_type → true
Native Overlay Diff → true
Memory swap limit → 2.00GB
Here is a snippet from cAdvisor:
The kworker and ksoftirqd processes change status constently from ‘D’ to ‘R’ to ‘S’
Question:
Are the machines specs correct for this setup?
How can I get the CPU usage to ‘normal’ levels?