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How to overcome the lack of video memory in large model training?

2025-09-05 1.5 K

Graphics Memory Optimization

For large models such as the Qwen 2.5-32B, the display memory problem:

  • Core Programs::
    1. Activating DeepSpeed's ZeRO-3 optimization: in thedeepspeed_config.jsonset up in"stage": 3
    2. Memory Pool Management with vLLM: Add--use-vllmpriming parameter
    3. Enabling 8-bit quantization: configuration--load-in-8bitReduces 60% video memory footprint
  • Options::
    • Gradient accumulation technique: setting--gradient-accumulation-steps 8
    • Model slicing: by--device-map autoAutomatic allocation of multi-GPU video memory

Hardware Adaptation Recommendations

Selected based on model size:

  • Qwen 2.5-7B: Minimum 1 x A10G (24GB) required
  • Qwen2.5-32B: 4 x A100 (80GB) configuration recommended
  • For consumer graphics cards: modifiablemodeling_qwen.pyAttention_head_dim reduces the head dimension in the

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