← Tuesday, October 6, 2026Cloud & infraBenchmark
Kubernetes node swap raises workload density by up to 3× with little latency cost
Benchmarks across kernel builds, headless browsers and isolated Python runtimes found up to 3× higher node density using swap backed by NVMe, often with little or no latency cost. This offers a concrete way to stretch memory-bound clusters running bursty or agent workloads.
- What
- Kubernetes node swap uses disk-backed swap to let nodes host more memory-intensive workloads; support reached General Availability in v1.34.
- How
- The Linux kernel pages anonymous memory to fast NVMe SSDs, while cgroup v2 tracks swap separately from memory.
- Why it matters
- In the tested workloads, local-SSD-backed swap raised node density by up to 3×, often with little or no latency cost.
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