Answer
Swap breaks kubelet memory accounting, causing unpredictable scheduling and OOM behavior.
Quick Answer
Swap changes memory pressure behavior in ways that break Kubernetes' resource accounting. With swap, the kernel can move memory pages to disk silently — a Pod appears to have "used" memory but it's actually on disk, making resource limits unreliable. Kubernetes' OOM killer and eviction logic assume in-memory resources are truly in memory.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ