diff --git a/app/main.py b/app/main.py
index 2fd092f..0ed4223 100644
--- a/app/main.py
+++ b/app/main.py
@@ -25,9 +25,9 @@ from FlagEmbedding import BGEM3FlagModel
 # Config
 # -----------------------------------------------------------------------------#
 MODEL_PATH = "model/bge-m3"          # 按需改成你的权重路径
-MODEL_VRAM_MB = int(os.getenv("MODEL_VRAM_MB", "8000"))   # bge-m3-large fp32 ≈ 8 GiB
-POST_LOAD_GAP_MB = 192
-SAFE_MIN_FREE_MB = MODEL_VRAM_MB + POST_LOAD_GAP_MB      # == 8192 MB
+MODEL_VRAM_MB = int(os.getenv("MODEL_VRAM_MB", "4800"))   # bge-m3-large fp16=2.4 fp32 ≈ 4.8 GiB
+POST_LOAD_GAP_MB = 200
+SAFE_MIN_FREE_MB = MODEL_VRAM_MB + POST_LOAD_GAP_MB      # == 5000 MB
 
 # 请求批次与单条最大长度上限（防御异常大 payload）
 MAX_BATCH = int(os.getenv("MAX_BATCH", "1024"))