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### What this PR does / why we need it? Fix the OOM (Out-of-Memory) error in the single-node-deepseek-v3-2-w8a8 nightly test of vllm-ascend: - Reduced the value of HCCL_BUFFSIZE - Lowered the gpu-memory-utilization Optimize service-side performance: Updated service-oriented configuration parameters (e.g., max-num-seqs, cudagraph_capture_sizes, batch_size) to improve the inference performance,so that the performance is closer to the optimal performance of the current mainline. Align performance baseline with main branch: Updated the performance baseline according to the latest performance data ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? The test has passed. https://github.com/vllm-project/vllm-ascend/actions/runs/23734079080/job/69134387320?pr=7793 --------- Signed-off-by: wyh145 <1987244901@qq.com>