v.25.8Improvement
Use information from cgroup
Use information from cgroup (if applicable, i.e.memory_worker_use_cgroupand cgroups are available) to adjust memory tracker (memory_worker_correct_memory_tracker). #83981 (Azat Khuzhin).
Why it matters
This feature improves the accuracy of memory usage reporting by incorporating control group (cgroup) data when the settingsmemory_worker_use_cgroup and appropriate cgroups are available. It ensures memory trackers reflect actual memory consumption more precisely, aiding in better resource management and monitoring.How to use it
Enable memory correction by setting the configuration parametermemory_worker_correct_memory_tracker to true and ensure memory_worker_use_cgroup is enabled if cgroups are used. When these conditions are met, ClickHouse will adjust the memory tracker based on cgroup statistics automatically.