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Troubleshooting: GPU OOM

Kubernetes GPU OOM — Fix CUDA Out-of-Memory the Right Way

GPU OOM is usually a configuration problem, not a hardware one. Here is how to find the real cause.

CUDA OutOfMemoryError, a Pod that OOMs under load, or a model that will not even load — GPU memory is the tightest resource in AI serving, and the fix is rarely "bigger GPU".

GPU OOM on Kubernetes comes from oversized batch size or context length, KV-cache growth under concurrency, memory fragmentation, loading a model too large for the GPU (or without quantization), or multiple co-tenants sharing a GPU without MIG/limits. We diagnose from DCGM memory metrics, the inference server’s own logs (e.g. vLLM KV-cache stats), and the OOM event — then fix via batch/context limits, gpu-memory-utilization settings, quantization, MIG partitioning, or right-sizing, so you reclaim headroom without overspending on hardware.

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FAQ

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Everything you need to know before getting started with job support or interview assistance.

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GPU OOM usually comes from oversized batch/context, KV-cache growth under load, fragmentation, a model too large for the GPU without quantization, or unmanaged GPU sharing. We diagnose it live by reading Pod events (kubectl describe), scheduler and device-plugin logs, container logs, GPU metrics (DCGM), and Prometheus/OpenTelemetry traces — then confirm the root cause before changing anything, rather than guessing.

We stabilise first — protect the running workload, control blast radius, and restore service — then apply the durable fix (scheduling, resource requests/limits, node/GPU configuration, probes, autoscaling policy, or manifest changes) and add the observability or guardrail that would have caught it earlier. You keep an engineer on the call throughout.

Yes. This is exactly the kind of incident we handle on-call. Message us on WhatsApp describing the symptom, your cluster and cloud (EKS/AKS/GKE/OpenShift/bare-metal), and what changed recently, and we will join and work it with you until the system is stable.

Both. This page explains the failure mode and how it is resolved so you can act on it yourself. If you would rather have an expert work it with you live — during an incident or as ongoing job support — that service is available same-day and confidentially.

Yes. After the fix we help you add the right alerts, SLOs, resource policies, admission controls, and runbooks so the same failure does not page you again — and we can review the rest of your platform for the same class of risk.

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Facing GPU out-of-memory (CUDA OOM) Right Now? Get an Engineer on the Call.

In-house Kubernetes, GPU, and inference experts available same-day for live incidents — we triage from your events, logs, and metrics, stabilise, and ship a durable fix. Talk to ProxyTechSupport on WhatsApp now.

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