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Katalyst v0.4.0 introduces tidal colocation for mixed workloads, online resource overcommit, fine‑grained NUMA memory management, OOM priority enhancements, and topology‑aware scheduling, providing a comprehensive cost‑optimization solution for cloud‑native Kubernetes clusters.
The new tiered resource‑guarantee system for Didi’s elastic cloud containers defines S, A, and B priority levels with explicit over‑commit rules, upgrades OS, Kubernetes, kube‑odin, service‑tree, and CMP components, and thereby cuts CPU contention by up to 80%, reduces latency, improves scaling reliability, and lowers operational costs.
This article introduces Amiya, a self‑developed overcommit component that dynamically increases Yarn memory and vCore capacity on Bilibili's offline big‑data clusters, details its architecture, key implementation of overcommit, eviction and mixed‑deployment strategies, and evaluates its resource‑utilization impact.