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Question0 answers1,063 followingPosted 26 Feb 2022, 19:32 UTC130.5K views2,875 votes

Docker Engine 20.10+ cgroup v2 Memory Limit Enforcement

cgroup v2 Memory Limit Enforcement in Docker Engine 20.10+ Docker Engine 20.10 introduced cgroup v2 support, fundamentally changing how memory limits are enforced within containers. The transition from cgroup v1's hierarchical memory accounting to cgroup v2's unified memory model affects OOM killer activation, memory pressure notifications, and limit granula

Community & Careers · Editorial question

Community & Careers

Question1 answer4,031 followingPosted 02 Feb 2020, 06:52 UTC118.6K views2,308 votes

owner answered

CPU throttling in cgroup v2 causes latency spikes under concurrent load

Diagnosing latency with cgroup v2 and PSI On Ubuntu 22.04 LTS and newer, systemd uses cgroup v2 by default. When multiple requests hit a service, the kernel enforces CPU, memory, and I/O quotas defined in the cgroup hierarchy. CPU throttling is recorded in /sys/fs/cgroup//cpu.stat where nr_throttled and throttled_usec increase whenever the cpu.max quota is e

Community & Careers · Editorial question

concurrency

ubuntu cgroup