diff --git a/app/chain/__init__.py b/app/chain/__init__.py
index bcc28686..766d3006 100644
--- a/app/chain/__init__.py
+++ b/app/chain/__init__.py
@@ -16,10 +16,10 @@ from app.schemas import TransferInfo, TransferTorrent, ExistMediaInfo, Downloadi
     WebhookEventInfo
 from app.schemas.types import TorrentStatus, MediaType, MediaImageType
 from app.utils.object import ObjectUtils
-from app.utils.singleton import AbstractSingleton, Singleton
+from app.utils.singleton import AbstractSingleton
 
 
-class ChainBase(AbstractSingleton, metaclass=Singleton):
+class ChainBase(AbstractSingleton):
     """
     处理链基类
     """
diff --git a/app/chain/message.py b/app/chain/message.py
index 827389a2..816821f9 100644
--- a/app/chain/message.py
+++ b/app/chain/message.py
@@ -1,5 +1,5 @@
 from typing import Any
-import gc
+
 from app.chain.download import *
 from app.chain.media import MediaChain
 from app.chain.search import SearchChain
@@ -9,9 +9,10 @@ from app.core.event import EventManager
 from app.log import logger
 from app.schemas import Notification
 from app.schemas.types import EventType, MessageChannel
+from app.utils.singleton import Singleton
 
 
-class MessageChain(ChainBase):
+class MessageChain(ChainBase, metaclass=Singleton):
     """
     外来消息处理链
     """
@@ -312,9 +313,6 @@ class MessageChain(ChainBase):
                                        userid=userid, total=len(medias))
         # 保存缓存
         self.save_cache(user_cache, self._cache_file)
-        # 主动回收内存
-        del user_cache
-        gc.collect()
 
     def __post_medias_message(self, channel: MessageChannel,
                               title: str, items: list, userid: str, total: int):
diff --git a/app/chain/subscribe.py b/app/chain/subscribe.py
index 4d28ecc7..6dc7543d 100644
--- a/app/chain/subscribe.py
+++ b/app/chain/subscribe.py
@@ -1,6 +1,5 @@
 import json
 import re
-import gc
 from datetime import datetime
 from typing import Dict, List, Optional, Union, Tuple
 
@@ -416,9 +415,6 @@ class SubscribeChain(ChainBase):
         self.__match(torrents_cache)
         # 保存缓存到本地
         self.save_cache(torrents_cache, self._cache_file)
-        # 主动回收内存
-        del torrents_cache
-        gc.collect()
 
     def __match(self, torrents_cache: Dict[str, List[Context]]):
         """