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WadeBarnes/container-throttling-queries.md

Last active November 10, 2023 19:19
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Container throttling queries that I keep forgetting about
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container-throttling-queries.md

Queries to determine how much a container is being throttled

Examples courtesy of Jason Leach.

Example promql query for OCP:

avg(container_cpu_cfs_throttled_periods_total / container_cpu_cfs_periods_total {namespace=~"4a9599-prod", pod=~".*mediator.*", container_name!="POD", image!=""} * 100) BY (pod)
  • The namespace portion of the query can be a problem when querying inside a namespace.

Example command line query:

$ cat /sys/fs/cgroup/cpu/cpu.stat
nr_periods 123978
nr_throttled 17778
throttled_time 360587202704

nr_throttled/nr_periods * 100 = 17778 / 123978 * 100 = Container is throttled 14.34% of the time

Additional Resources/Discussions:

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