启用数据库预加载器，清理日志

src/common/database/api/crud.py

@@ -21,6 +21,7 @@ from src.common.database.optimization import (
     Priority,
     get_batch_scheduler,
     get_cache,
+    record_preload_access,
 )
 from src.common.logger import get_logger
 
@@ -145,6 +146,16 @@ class CRUDBase(Generic[T]):
         """
         cache_key = f"{self.model_name}:id:{id}"
 
+        if use_cache:
+            async def _preload_loader() -> dict[str, Any] | None:
+                async with get_db_session() as session:
+                    stmt = select(self.model).where(self.model.id == id)
+                    result = await session.execute(stmt)
+                    instance = result.scalar_one_or_none()
+                    return _model_to_dict(instance) if instance is not None else None
+
+            await record_preload_access(cache_key, loader=_preload_loader)
+
         # 尝试从缓存获取 (缓存的是字典)
         if use_cache:
             cache = await get_cache()
@@ -189,6 +200,21 @@ class CRUDBase(Generic[T]):
         """
         cache_key = f"{self.model_name}:filter:{sorted(filters.items())!s}"
 
+        filters_copy = dict(filters)
+        if use_cache:
+            async def _preload_loader() -> dict[str, Any] | None:
+                async with get_db_session() as session:
+                    stmt = select(self.model)
+                    for key, value in filters_copy.items():
+                        if hasattr(self.model, key):
+                            stmt = stmt.where(getattr(self.model, key) == value)
+
+                    result = await session.execute(stmt)
+                    instance = result.scalar_one_or_none()
+                    return _model_to_dict(instance) if instance is not None else None
+
+            await record_preload_access(cache_key, loader=_preload_loader)
+
         # 尝试从缓存获取 (缓存的是字典)
         if use_cache:
             cache = await get_cache()
@@ -241,6 +267,29 @@ class CRUDBase(Generic[T]):
         """
         cache_key = f"{self.model_name}:multi:{skip}:{limit}:{sorted(filters.items())!s}"
 
+        filters_copy = dict(filters)
+        if use_cache:
+            async def _preload_loader() -> list[dict[str, Any]]:
+                async with get_db_session() as session:
+                    stmt = select(self.model)
+
+                    # 应用过滤条件
+                    for key, value in filters_copy.items():
+                        if hasattr(self.model, key):
+                            if isinstance(value, list | tuple | set):
+                                stmt = stmt.where(getattr(self.model, key).in_(value))
+                            else:
+                                stmt = stmt.where(getattr(self.model, key) == value)
+
+                    # 应用分页
+                    stmt = stmt.offset(skip).limit(limit)
+
+                    result = await session.execute(stmt)
+                    instances = list(result.scalars().all())
+                    return [_model_to_dict(inst) for inst in instances]
+
+            await record_preload_access(cache_key, loader=_preload_loader)
+
         # 尝试从缓存获取 (缓存的是字典列表)
         if use_cache:
             cache = await get_cache()

src/common/database/api/query.py

@@ -17,7 +17,7 @@ from sqlalchemy import and_, asc, desc, func, or_, select
 from src.common.database.api.crud import _dict_to_model, _model_to_dict
 from src.common.database.core.models import Base
 from src.common.database.core.session import get_db_session
-from src.common.database.optimization import get_cache
+from src.common.database.optimization import get_cache, record_preload_access
 from src.common.logger import get_logger
 
 logger = get_logger("database.query")
@@ -273,6 +273,16 @@ class QueryBuilder(Generic[T]):
             模型实例列表或字典列表
         """
         cache_key = ":".join(self._cache_key_parts) + ":all"
+        stmt = self._stmt
+
+        if self._use_cache:
+            async def _preload_loader() -> list[dict[str, Any]]:
+                async with get_db_session() as session:
+                    result = await session.execute(stmt)
+                    instances = list(result.scalars().all())
+                    return [_model_to_dict(inst) for inst in instances]
+
+            await record_preload_access(cache_key, loader=_preload_loader)
 
         # 尝试从缓存获取 (缓存的是字典列表)
         if self._use_cache:
@@ -311,6 +321,16 @@ class QueryBuilder(Generic[T]):
             模型实例或None
         """
         cache_key = ":".join(self._cache_key_parts) + ":first"
+        stmt = self._stmt
+
+        if self._use_cache:
+            async def _preload_loader() -> dict[str, Any] | None:
+                async with get_db_session() as session:
+                    result = await session.execute(stmt)
+                    instance = result.scalars().first()
+                    return _model_to_dict(instance) if instance is not None else None
+
+            await record_preload_access(cache_key, loader=_preload_loader)
 
         # 尝试从缓存获取 (缓存的是字典)
         if self._use_cache:
@@ -349,6 +369,15 @@ class QueryBuilder(Generic[T]):
             记录数量
         """
         cache_key = ":".join(self._cache_key_parts) + ":count"
+        count_stmt = select(func.count()).select_from(self._stmt.subquery())
+
+        if self._use_cache:
+            async def _preload_loader() -> int:
+                async with get_db_session() as session:
+                    result = await session.execute(count_stmt)
+                    return result.scalar() or 0
+
+            await record_preload_access(cache_key, loader=_preload_loader)
 
         # 尝试从缓存获取
         if self._use_cache:
@@ -358,8 +387,6 @@ class QueryBuilder(Generic[T]):
                 return cached
 
         # 构建count查询
-        count_stmt = select(func.count()).select_from(self._stmt.subquery())
-
         # 从数据库查询
         async with get_db_session() as session:
             result = await session.execute(count_stmt)

src/common/database/core/engine.py

@@ -79,7 +79,7 @@ async def get_engine() -> AsyncEngine:
             elif db_type == "postgresql":
                 await _enable_postgresql_optimizations(_engine)
 
-            logger.info(f"✅ {db_type.upper()} 数据库引擎初始化成功")
+            logger.info(f"{db_type.upper()} 数据库引擎初始化成功")
             return _engine
 
         except Exception as e:
@@ -116,7 +116,7 @@ def _build_sqlite_config(config) -> tuple[str, dict]:
         },
     }
 
-    logger.info(f"SQLite配置: {db_path}")
+    logger.debug(f"SQLite配置: {db_path}")
     return url, engine_kwargs
 
 
@@ -167,7 +167,7 @@ def _build_postgresql_config(config) -> tuple[str, dict]:
     if connect_args:
         engine_kwargs["connect_args"] = connect_args
 
-    logger.info(
+    logger.debug(
         f"PostgreSQL配置: {config.postgresql_user}@{config.postgresql_host}:{config.postgresql_port}/{config.postgresql_database}"
     )
     return url, engine_kwargs
@@ -184,7 +184,7 @@ async def close_engine():
         logger.info("正在关闭数据库引擎...")
         await _engine.dispose()
         _engine = None
-        logger.info("✅ 数据库引擎已关闭")
+        logger.info("数据库引擎已关闭")
 
 
 async def _enable_sqlite_optimizations(engine: AsyncEngine):
@@ -214,8 +214,6 @@ async def _enable_sqlite_optimizations(engine: AsyncEngine):
             # 临时存储使用内存
             await conn.execute(text("PRAGMA temp_store = MEMORY"))
 
-        logger.info("✅ SQLite性能优化已启用 (WAL模式 + 并发优化)")
-
     except Exception as e:
         logger.warning(f"⚠️ SQLite性能优化失败: {e}，将使用默认配置")
 
@@ -241,8 +239,6 @@ async def _enable_postgresql_optimizations(engine: AsyncEngine):
             # 启用自动 EXPLAIN（可选，用于调试）
             # await conn.execute(text("SET auto_explain.log_min_duration = '1000'"))
 
-        logger.info("✅ PostgreSQL性能优化已启用")
-
     except Exception as e:
         logger.warning(f"⚠️ PostgreSQL性能优化失败: {e}，将使用默认配置")
 

src/common/database/optimization/__init__.py

@@ -28,6 +28,7 @@ from .preloader import (
     DataPreloader,
     close_preloader,
     get_preloader,
+    record_preload_access,
 )
 
 __all__ = [
@@ -51,4 +52,5 @@ __all__ = [
     "get_batch_scheduler",
     "get_cache",
     "get_preloader",
+    "record_preload_access",
 ]

src/common/database/optimization/preloader.py

@@ -13,6 +13,7 @@ from collections import defaultdict
 from collections.abc import Awaitable, Callable
 from dataclasses import dataclass, field
 from typing import Any
+from collections import OrderedDict
 
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -22,6 +23,15 @@ from src.common.logger import get_logger
 
 logger = get_logger("preloader")
 
+# 预加载注册表（用于后台刷新热点数据）
+_preload_loader_registry: OrderedDict[str, Callable[[], Awaitable[Any]]] = OrderedDict()
+_registry_lock = asyncio.Lock()
+_preload_task: asyncio.Task | None = None
+_preload_task_lock = asyncio.Lock()
+_PRELOAD_REGISTRY_LIMIT = 1024
+# 默认后台预加载轮询间隔（秒）
+_DEFAULT_PRELOAD_INTERVAL = 60
+
 
 @dataclass
 class AccessPattern:
@@ -223,16 +233,19 @@ class DataPreloader:
 
     async def start_preload_batch(
         self,
-        session: AsyncSession,
         loaders: dict[str, Callable[[], Awaitable[Any]]],
+        limit: int = 100,
     ) -> None:
         """批量启动预加载任务
 
         Args:
-            session: 数据库会话
             loaders: 数据键到加载函数的映射
+            limit: 参与预加载的热点键数量上限
         """
-        preload_keys = await self.get_preload_keys()
+        if not loaders:
+            return
+
+        preload_keys = await self.get_preload_keys(limit=limit)
 
         for key in preload_keys:
             if key in loaders:
@@ -418,6 +431,91 @@ class CommonDataPreloader:
         await self.preloader.preload_data(cache_key, loader)
 
 
+# 预加载后台任务与注册表管理
+async def _get_preload_interval() -> float:
+    """获取后台预加载轮询间隔"""
+    try:
+        from src.config.config import global_config
+
+        if global_config and getattr(global_config, "database", None):
+            interval = getattr(global_config.database, "preload_interval", None)
+            if interval:
+                return max(5.0, float(interval))
+    except Exception:
+        # 配置可能未加载或不存在该字段，使用默认值
+        pass
+    return float(_DEFAULT_PRELOAD_INTERVAL)
+
+
+async def _register_preload_loader(
+    cache_key: str,
+    loader: Callable[[], Awaitable[Any]],
+) -> None:
+    """注册用于热点预加载的加载函数"""
+    async with _registry_lock:
+        # move_to_end可以保持最近注册的顺序，便于淘汰旧项
+        _preload_loader_registry[cache_key] = loader
+        _preload_loader_registry.move_to_end(cache_key)
+
+        # 控制注册表大小，避免无限增长
+        while len(_preload_loader_registry) > _PRELOAD_REGISTRY_LIMIT:
+            _preload_loader_registry.popitem(last=False)
+
+
+async def _snapshot_loaders() -> dict[str, Callable[[], Awaitable[Any]]]:
+    """获取当前注册的预加载loader快照"""
+    async with _registry_lock:
+        return dict(_preload_loader_registry)
+
+
+async def _preload_worker() -> None:
+    """后台周期性预加载任务"""
+    while True:
+        try:
+            interval = await _get_preload_interval()
+            loaders = await _snapshot_loaders()
+
+            if loaders:
+                preloader = await get_preloader()
+                await preloader.start_preload_batch(loaders)
+
+            await asyncio.sleep(interval)
+        except asyncio.CancelledError:
+            break
+        except Exception as e:
+            logger.error(f"预加载后台任务异常: {e}")
+            # 避免紧急重试导致CPU占用过高
+            await asyncio.sleep(5)
+
+
+async def _ensure_preload_worker() -> None:
+    """确保后台预加载任务已启动"""
+    global _preload_task
+
+    async with _preload_task_lock:
+        if _preload_task is None or _preload_task.done():
+            _preload_task = asyncio.create_task(_preload_worker())
+
+
+async def record_preload_access(
+    cache_key: str,
+    *,
+    related_keys: list[str] | None = None,
+    loader: Callable[[], Awaitable[Any]] | None = None,
+) -> None:
+    """记录访问并注册预加载loader
+
+    这个入口为上层API（CRUD/Query）提供：记录访问模式、建立关联关系、
+    以及注册用于后续后台预加载的加载函数。
+    """
+    preloader = await get_preloader()
+    await preloader.record_access(cache_key, related_keys)
+
+    if loader is not None:
+        await _register_preload_loader(cache_key, loader)
+        await _ensure_preload_worker()
+
+
 # 全局预加载器实例
 _global_preloader: DataPreloader | None = None
 _preloader_lock = asyncio.Lock()
@@ -438,7 +536,22 @@ async def get_preloader() -> DataPreloader:
 async def close_preloader() -> None:
     """关闭全局预加载器"""
     global _global_preloader
+    global _preload_task
 
+    # 停止后台任务
+    if _preload_task is not None:
+        _preload_task.cancel()
+        try:
+            await _preload_task
+        except asyncio.CancelledError:
+            pass
+        _preload_task = None
+
+    # 清理注册表
+    async with _registry_lock:
+        _preload_loader_registry.clear()
+
+    # 清理预加载器实例
     if _global_preloader is not None:
         await _global_preloader.clear()
         _global_preloader = None