数据库监控日志、接口监控，熔断机制，提高连接池

app/core/database.py

@@ -1,14 +1,28 @@
 from sqlalchemy import create_engine, MetaData
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
+from sqlalchemy.pool import QueuePool
 from .config import settings
 
-engine = create_engine(settings.DATABASE_URL, pool_pre_ping=True, echo=False, pool_size=30, max_overflow=60, pool_timeout=30, pool_recycle=3600)
+# 创建带连接池监控的引擎
+engine = create_engine(
+    settings.DATABASE_URL,
+    poolclass=QueuePool,
+    pool_pre_ping=True,
+    echo=False,  # 生产环境建议关闭SQL日志
+    pool_size=400,
+    max_overflow=600,
+    pool_timeout=60,  # 增加超时时间到60秒
+    pool_recycle=3600,  # 1小时回收连接
+    pool_reset_on_return='commit'  # 归还连接时重置状态
+)
+
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 
 Base = declarative_base()
 
 def get_db():
+    """数据库依赖注入函数"""
     db = SessionLocal()
     try:
         yield db