vLLM, SGLang, Ollama & Kubernetes GPU Config Compiler

Stop guessing --gpu-memory-utilization, --tensor-parallel-size, and --max-model-len by trial and error. Select your open-weight model, quantization, context target, and GPU topology to compile production-ready launch commands and container manifests.

Cluster & Runtime Parameters

32,768 tokens
16

Pre-Flight Memory & Parallelism Check

Out of Memory (OOM)
Total Required Memory
101.42 / 80 GB
Per-Device Allocation: 101.42 GB
gpu-memory-utilization
0.95
TP Head Split: 64Q / 8KV OK
Est. Single-Stream Decode
0.0 tok/s
Est. Batched Throughput: 0.0 tok/s
Max Context Before OOM
21,770
tokens
bash · vLLM
vllm serve Qwen/Qwen3-32B \
  --tensor-parallel-size 1 \
  --max-model-len 32768 \
  --max-num-seqs 16 \
  --gpu-memory-utilization 0.95 \
  --quantization fp8 \
  --kv-cache-dtype fp8 \
  --enable-prefix-caching \
  --port 8000

Key Flag Guardrails Compiled Automatically

Tensor parallelism splits attention heads and MLP matrices across NVLink or PCIe devices, so --tensor-parallel-size must evenly divide query and KV head counts while leaving headroom for NCCL all-reduce buffers and CUDA graph capture.

When KV cache quantization (FP8 E4M3 or Q8_0) is selected, VRAMLab emits --kv-cache-dtype fp8 for vLLM, --kv-cache-dtype fp8_e4m3 for SGLang, and OLLAMA_KV_CACHE_TYPE=q8_0 / --cache-type-k flags so long-context concurrency doubles without touching weight precision.

Back-of-the-envelope rules ignore three dominant variables in modern open-weight inference: GGUF super-block quantization scales (where Q4_K_M averages 4.85 bits/weight rather than 4.00), KV cache growth across long context windows and concurrent continuous-batching slots, and Mixture-of-Experts routing where all 671B or 235B parameters sit in VRAM while only 37B or 22B stream per generated token.