diff --git a/api/db/joint_services/memory_message_service.py b/api/db/joint_services/memory_message_service.py
index 0b1016bc6..2d581cebf 100644
--- a/api/db/joint_services/memory_message_service.py
+++ b/api/db/joint_services/memory_message_service.py
@@ -223,13 +223,8 @@ def init_memory_size_cache():
     if not memory_list:
         logging.info("No memory found, no need to init memory size.")
     else:
-        memory_size_map = MessageService.calculate_memory_size(
-            memory_ids=[m.id for m in memory_list],
-            uid_list=[m.tenant_id for m in memory_list],
-        )
-        for memory in memory_list:
-            memory_size = memory_size_map.get(memory.id, 0)
-            set_memory_size_cache(memory.id, memory_size)
+        for m in memory_list:
+            get_memory_size_cache(m.id, m.tenant_id)
         logging.info("Memory size cache init done.")
 
 
diff --git a/memory/services/messages.py b/memory/services/messages.py
index cfa722100..29f0f4da1 100644
--- a/memory/services/messages.py
+++ b/memory/services/messages.py
@@ -198,7 +198,7 @@ class MessageService:
         message_list = settings.msgStoreConn.get_fields(res, select_fields)
         current_size = 0
         ids_to_remove = []
-        for message in message_list:
+        for message in message_list.values():
             if current_size < size_to_delete:
                 current_size += cls.calculate_message_size(message)
                 ids_to_remove.append(message["message_id"])
@@ -210,7 +210,7 @@ class MessageService:
         order_by = OrderByExpr()
         order_by.asc("valid_at")
         res = settings.msgStoreConn.search(
-            select_fields=["memory_id", "content", "content_embed"],
+            select_fields=select_fields,
             highlight_fields=[],
             condition={},
             match_expressions=[],
@@ -222,7 +222,7 @@ class MessageService:
         for doc in docs.values():
             if current_size < size_to_delete:
                 current_size += cls.calculate_message_size(doc)
-                ids_to_remove.append(doc["memory_id"])
+                ids_to_remove.append(doc["message_id"])
             else:
                 return ids_to_remove, current_size
         return ids_to_remove, current_size
diff --git a/memory/utils/es_conn.py b/memory/utils/es_conn.py
index dc98e871d..b75b9df56 100644
--- a/memory/utils/es_conn.py
+++ b/memory/utils/es_conn.py
@@ -127,6 +127,11 @@ class ESConnection(ESConnectionBase):
             index_names = index_names.split(",")
         assert isinstance(index_names, list) and len(index_names) > 0
         assert "_id" not in condition
+
+        exist_index_list = [idx for idx in index_names if self.index_exist(idx)]
+        if not exist_index_list:
+            return None
+
         bool_query = Q("bool", must=[], must_not=[])
         if hide_forgotten:
             # filter not forget
@@ -214,7 +219,7 @@ class ESConnection(ESConnectionBase):
         for i in range(ATTEMPT_TIME):
             try:
                 #print(json.dumps(q, ensure_ascii=False))
-                res = self.es.search(index=index_names,
+                res = self.es.search(index=exist_index_list,
                                      body=q,
                                      timeout="600s",
                                      # search_type="dfs_query_then_fetch",
@@ -239,8 +244,8 @@ class ESConnection(ESConnectionBase):
         raise Exception("ESConnection.search timeout.")
 
     def get_forgotten_messages(self, select_fields: list[str], index_name: str, memory_id: str, limit: int=512):
-        bool_query = Q("bool", must_not=[])
-        bool_query.must_not.append(Q("term", forget_at=None))
+        bool_query = Q("bool", must=[])
+        bool_query.must.append(Q("exists", field="forget_at"))
         bool_query.filter.append(Q("term", memory_id=memory_id))
         # from old to new
         order_by = OrderByExpr()