diff --git a/dbgpt/model/cluster/worker/default_worker.py b/dbgpt/model/cluster/worker/default_worker.py
index a42858bb4..26f2b40ae 100644
--- a/dbgpt/model/cluster/worker/default_worker.py
+++ b/dbgpt/model/cluster/worker/default_worker.py
@@ -189,7 +189,7 @@ def generate(self, params: Dict) -> ModelOutput:
         return output
 
     def count_token(self, prompt: str) -> int:
-        return _try_to_count_token(prompt, self.tokenizer)
+        return _try_to_count_token(prompt, self.tokenizer, self.model)
 
     async def async_count_token(self, prompt: str) -> int:
         # TODO if we deploy the model by vllm, it can't work, we should run transformer _try_to_count_token to async
@@ -454,12 +454,13 @@ def _new_metrics_from_model_output(
     return metrics
 
 
-def _try_to_count_token(prompt: str, tokenizer) -> int:
+def _try_to_count_token(prompt: str, tokenizer, model) -> int:
     """Try to count token of prompt
 
     Args:
         prompt (str): prompt
         tokenizer ([type]): tokenizer
+        model ([type]): model
 
     Returns:
         int: token count, if error return -1
@@ -467,6 +468,11 @@ def _try_to_count_token(prompt: str, tokenizer) -> int:
     TODO: More implementation
     """
     try:
+        from dbgpt.model.proxy.llms.proxy_model import ProxyModel
+
+        if isinstance(model, ProxyModel):
+            return model.count_token(prompt)
+        # Only support huggingface model now
         return len(tokenizer(prompt).input_ids[0])
     except Exception as e:
         logger.warning(f"Count token error, detail: {e}, return -1")
diff --git a/dbgpt/model/cluster/worker/manager.py b/dbgpt/model/cluster/worker/manager.py
index 83b39370e..8a8af3b35 100644
--- a/dbgpt/model/cluster/worker/manager.py
+++ b/dbgpt/model/cluster/worker/manager.py
@@ -197,7 +197,7 @@ def add_worker(
             return True
         else:
             # TODO Update worker
-            logger.warn(f"Instance {worker_key} exist")
+            logger.warning(f"Instance {worker_key} exist")
             return False
 
     def _remove_worker(self, worker_params: ModelWorkerParameters) -> None:
@@ -229,7 +229,7 @@ async def model_startup(self, startup_req: WorkerStartupRequest):
         )
         if not success:
             msg = f"Add worker {model_name}@{worker_type}, worker instances is exist"
-            logger.warn(f"{msg}, worker_params: {worker_params}")
+            logger.warning(f"{msg}, worker_params: {worker_params}")
             self._remove_worker(worker_params)
             raise Exception(msg)
         supported_types = WorkerType.values()
diff --git a/dbgpt/model/proxy/llms/chatgpt.py b/dbgpt/model/proxy/llms/chatgpt.py
index 1b98e8a8a..b57ae0486 100755
--- a/dbgpt/model/proxy/llms/chatgpt.py
+++ b/dbgpt/model/proxy/llms/chatgpt.py
@@ -92,11 +92,11 @@ def _initialize_openai_v1(params: ProxyModelParameters):
 
 
 def __convert_2_gpt_messages(messages: List[ModelMessage]):
-    chat_round = 0
     gpt_messages = []
     last_usr_message = ""
     system_messages = []
 
+    # TODO: We can't change message order in low level
     for message in messages:
         if message.role == ModelMessageRoleType.HUMAN or message.role == "user":
             last_usr_message = message.content
diff --git a/dbgpt/model/proxy/llms/proxy_model.py b/dbgpt/model/proxy/llms/proxy_model.py
index 5d5a3feb4..4e55ec3ea 100644
--- a/dbgpt/model/proxy/llms/proxy_model.py
+++ b/dbgpt/model/proxy/llms/proxy_model.py
@@ -1,9 +1,36 @@
+from __future__ import annotations
+
+from typing import Union, List, Optional, TYPE_CHECKING
+import logging
 from dbgpt.model.parameter import ProxyModelParameters
+from dbgpt.model.utils.token_utils import ProxyTokenizerWrapper
+
+if TYPE_CHECKING:
+    from dbgpt.core.interface.message import ModelMessage, BaseMessage
+
+logger = logging.getLogger(__name__)
 
 
 class ProxyModel:
     def __init__(self, model_params: ProxyModelParameters) -> None:
         self._model_params = model_params
+        self._tokenizer = ProxyTokenizerWrapper()
 
     def get_params(self) -> ProxyModelParameters:
         return self._model_params
+
+    def count_token(
+        self,
+        messages: Union[str, BaseMessage, ModelMessage, List[ModelMessage]],
+        model_name: Optional[int] = None,
+    ) -> int:
+        """Count token of given messages
+
+        Args:
+            messages (Union[str, BaseMessage, ModelMessage, List[ModelMessage]]): messages to count token
+            model_name (Optional[int], optional): model name. Defaults to None.
+
+        Returns:
+            int: token count, -1 if failed
+        """
+        return self._tokenizer.count_token(messages, model_name)
diff --git a/dbgpt/model/utils/chatgpt_utils.py b/dbgpt/model/utils/chatgpt_utils.py
index 02333b2b1..4e9cfc353 100644
--- a/dbgpt/model/utils/chatgpt_utils.py
+++ b/dbgpt/model/utils/chatgpt_utils.py
@@ -25,6 +25,7 @@
 from dbgpt.model.cluster.client import DefaultLLMClient
 from dbgpt.model.cluster import WorkerManagerFactory
 from dbgpt._private.pydantic import model_to_json
+from dbgpt.model.utils.token_utils import ProxyTokenizerWrapper
 
 if TYPE_CHECKING:
     import httpx
@@ -152,6 +153,7 @@ def __init__(
         self._context_length = context_length
         self._client = openai_client
         self._openai_kwargs = openai_kwargs or {}
+        self._tokenizer = ProxyTokenizerWrapper()
 
     @property
     def client(self) -> ClientType:
@@ -238,10 +240,11 @@ async def get_context_length(self) -> int:
     async def count_token(self, model: str, prompt: str) -> int:
         """Count the number of tokens in a given prompt.
 
-        TODO: Get the real number of tokens from the openai api or tiktoken package
+        Args:
+            model (str): The model name.
+            prompt (str): The prompt.
         """
-
-        raise NotImplementedError()
+        return self._tokenizer.count_token(prompt, model)
 
 
 class OpenAIStreamingOperator(TransformStreamAbsOperator[ModelOutput, str]):
diff --git a/dbgpt/model/utils/token_utils.py b/dbgpt/model/utils/token_utils.py
new file mode 100644
index 000000000..281ed5eed
--- /dev/null
+++ b/dbgpt/model/utils/token_utils.py
@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+from typing import Union, List, Optional, TYPE_CHECKING
+import logging
+
+if TYPE_CHECKING:
+    from dbgpt.core.interface.message import ModelMessage, BaseMessage
+
+logger = logging.getLogger(__name__)
+
+
+class ProxyTokenizerWrapper:
+    def __init__(self) -> None:
+        self._support_encoding = True
+        self._encoding_model = None
+
+    def count_token(
+        self,
+        messages: Union[str, BaseMessage, ModelMessage, List[ModelMessage]],
+        model_name: Optional[str] = None,
+    ) -> int:
+        """Count token of given messages
+
+        Args:
+            messages (Union[str, BaseMessage, ModelMessage, List[ModelMessage]]): messages to count token
+            model_name (Optional[str], optional): model name. Defaults to None.
+
+        Returns:
+            int: token count, -1 if failed
+        """
+        if not self._support_encoding:
+            logger.warning(
+                "model does not support encoding model, can't count token, returning -1"
+            )
+            return -1
+        encoding = self._get_or_create_encoding_model(model_name)
+        cnt = 0
+        if isinstance(messages, str):
+            cnt = len(encoding.encode(messages, disallowed_special=()))
+        elif isinstance(messages, BaseMessage):
+            cnt = len(encoding.encode(messages.content, disallowed_special=()))
+        elif isinstance(messages, ModelMessage):
+            cnt = len(encoding.encode(messages.content, disallowed_special=()))
+        elif isinstance(messages, list):
+            for message in messages:
+                cnt += len(encoding.encode(message.content, disallowed_special=()))
+        else:
+            logger.warning(
+                "unsupported type of messages, can't count token, returning -1"
+            )
+            return -1
+        return cnt
+
+    def _get_or_create_encoding_model(self, model_name: Optional[str] = None):
+        """Get or create encoding model for given model name
+        More detail see: https://github.com/openai/openai-cookbook/blob/main/examples/How_to_count_tokens_with_tiktoken.ipynb
+        """
+        if self._encoding_model:
+            return self._encoding_model
+        try:
+            import tiktoken
+
+            logger.info(
+                "tiktoken installed, using it to count tokens, tiktoken will download tokenizer from network, "
+                "also you can download it and put it in the directory of environment variable TIKTOKEN_CACHE_DIR"
+            )
+        except ImportError:
+            self._support_encoding = False
+            logger.warn("tiktoken not installed, cannot count tokens, returning -1")
+            return -1
+        try:
+            if not model_name:
+                model_name = "gpt-3.5-turbo"
+            self._encoding_model = tiktoken.model.encoding_for_model(model_name)
+        except KeyError:
+            logger.warning(
+                f"{model_name}'s tokenizer not found, using cl100k_base encoding."
+            )
+            self._encoding_model = tiktoken.get_encoding("cl100k_base")
+        return self._encoding_model
diff --git a/dbgpt/serve/conversation/tests/test_models.py b/dbgpt/serve/conversation/tests/test_models.py
index 218307f1a..1d111644d 100644
--- a/dbgpt/serve/conversation/tests/test_models.py
+++ b/dbgpt/serve/conversation/tests/test_models.py
@@ -1,5 +1,3 @@
-from typing import List
-
 import pytest
 
 from dbgpt.storage.metadata import db
@@ -39,11 +37,9 @@ def test_table_exist():
 
 
 def test_entity_create(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    # TODO: implement your test case
     with db.session() as session:
-        db_entity: ServeEntity = session.query(ServeEntity).get(entity.id)
-        assert db_entity.id == entity.id
+        entity = ServeEntity(**default_entity_dict)
+        session.add(entity)
 
 
 def test_entity_unique_key(default_entity_dict):
@@ -52,10 +48,8 @@ def test_entity_unique_key(default_entity_dict):
 
 
 def test_entity_get(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity.id == entity.id
     # TODO: implement your test case
+    pass
 
 
 def test_entity_update(default_entity_dict):
@@ -65,10 +59,7 @@ def test_entity_update(default_entity_dict):
 
 def test_entity_delete(default_entity_dict):
     # TODO: implement your test case
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    entity.delete()
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity is None
+    pass
 
 
 def test_entity_all():
diff --git a/dbgpt/serve/prompt/tests/test_models.py b/dbgpt/serve/prompt/tests/test_models.py
index 744412ec5..cc9988216 100644
--- a/dbgpt/serve/prompt/tests/test_models.py
+++ b/dbgpt/serve/prompt/tests/test_models.py
@@ -47,9 +47,11 @@ def test_table_exist():
 
 
 def test_entity_create(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
     with db.session() as session:
-        db_entity: ServeEntity = session.query(ServeEntity).get(entity.id)
+        entity: ServeEntity = ServeEntity(**default_entity_dict)
+        session.add(entity)
+        session.commit()
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
         assert db_entity.id == entity.id
         assert db_entity.chat_scene == "chat_data"
         assert db_entity.sub_chat_scene == "excel"
@@ -63,78 +65,96 @@ def test_entity_create(default_entity_dict):
 
 
 def test_entity_unique_key(default_entity_dict):
-    ServeEntity.create(**default_entity_dict)
+    with db.session() as session:
+        entity = ServeEntity(**default_entity_dict)
+        session.add(entity)
     with pytest.raises(Exception):
-        ServeEntity.create(
-            **{
-                "prompt_name": "my_prompt_1",
-                "sys_code": "dbgpt",
-                "prompt_language": "zh",
-                "model": "vicuna-13b-v1.5",
-            }
-        )
+        with db.session() as session:
+            entity = ServeEntity(
+                **{
+                    "prompt_name": "my_prompt_1",
+                    "sys_code": "dbgpt",
+                    "prompt_language": "zh",
+                    "model": "vicuna-13b-v1.5",
+                }
+            )
+            session.add(entity)
 
 
 def test_entity_get(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity.id == entity.id
-    assert db_entity.chat_scene == "chat_data"
-    assert db_entity.sub_chat_scene == "excel"
-    assert db_entity.prompt_type == "common"
-    assert db_entity.prompt_name == "my_prompt_1"
-    assert db_entity.content == "Write a qsort function in python."
-    assert db_entity.user_name == "zhangsan"
-    assert db_entity.sys_code == "dbgpt"
-    assert db_entity.gmt_created is not None
-    assert db_entity.gmt_modified is not None
+    with db.session() as session:
+        entity = ServeEntity(**default_entity_dict)
+        session.add(entity)
+        session.commit()
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
+        assert db_entity.id == entity.id
+        assert db_entity.chat_scene == "chat_data"
+        assert db_entity.sub_chat_scene == "excel"
+        assert db_entity.prompt_type == "common"
+        assert db_entity.prompt_name == "my_prompt_1"
+        assert db_entity.content == "Write a qsort function in python."
+        assert db_entity.user_name == "zhangsan"
+        assert db_entity.sys_code == "dbgpt"
+        assert db_entity.gmt_created is not None
+        assert db_entity.gmt_modified is not None
 
 
 def test_entity_update(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    entity.update(prompt_name="my_prompt_2")
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity.id == entity.id
-    assert db_entity.chat_scene == "chat_data"
-    assert db_entity.sub_chat_scene == "excel"
-    assert db_entity.prompt_type == "common"
-    assert db_entity.prompt_name == "my_prompt_2"
-    assert db_entity.content == "Write a qsort function in python."
-    assert db_entity.user_name == "zhangsan"
-    assert db_entity.sys_code == "dbgpt"
-    assert db_entity.gmt_created is not None
-    assert db_entity.gmt_modified is not None
+    with db.session() as session:
+        entity = ServeEntity(**default_entity_dict)
+        session.add(entity)
+        session.commit()
+        entity.prompt_name = "my_prompt_2"
+        session.merge(entity)
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
+        assert db_entity.id == entity.id
+        assert db_entity.chat_scene == "chat_data"
+        assert db_entity.sub_chat_scene == "excel"
+        assert db_entity.prompt_type == "common"
+        assert db_entity.prompt_name == "my_prompt_2"
+        assert db_entity.content == "Write a qsort function in python."
+        assert db_entity.user_name == "zhangsan"
+        assert db_entity.sys_code == "dbgpt"
+        assert db_entity.gmt_created is not None
+        assert db_entity.gmt_modified is not None
 
 
 def test_entity_delete(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    entity.delete()
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity is None
+    with db.session() as session:
+        entity = ServeEntity(**default_entity_dict)
+        session.add(entity)
+        session.commit()
+        session.delete(entity)
+        session.commit()
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
+        assert db_entity is None
 
 
 def test_entity_all():
-    for i in range(10):
-        ServeEntity.create(
-            chat_scene="chat_data",
-            sub_chat_scene="excel",
-            prompt_type="common",
-            prompt_name=f"my_prompt_{i}",
-            content="Write a qsort function in python.",
-            user_name="zhangsan",
-            sys_code="dbgpt",
-        )
-    entities = ServeEntity.all()
-    assert len(entities) == 10
-    for entity in entities:
-        assert entity.chat_scene == "chat_data"
-        assert entity.sub_chat_scene == "excel"
-        assert entity.prompt_type == "common"
-        assert entity.content == "Write a qsort function in python."
-        assert entity.user_name == "zhangsan"
-        assert entity.sys_code == "dbgpt"
-        assert entity.gmt_created is not None
-        assert entity.gmt_modified is not None
+    with db.session() as session:
+        for i in range(10):
+            entity = ServeEntity(
+                chat_scene="chat_data",
+                sub_chat_scene="excel",
+                prompt_type="common",
+                prompt_name=f"my_prompt_{i}",
+                content="Write a qsort function in python.",
+                user_name="zhangsan",
+                sys_code="dbgpt",
+            )
+            session.add(entity)
+    with db.session() as session:
+        entities = session.query(ServeEntity).all()
+        assert len(entities) == 10
+        for entity in entities:
+            assert entity.chat_scene == "chat_data"
+            assert entity.sub_chat_scene == "excel"
+            assert entity.prompt_type == "common"
+            assert entity.content == "Write a qsort function in python."
+            assert entity.user_name == "zhangsan"
+            assert entity.sys_code == "dbgpt"
+            assert entity.gmt_created is not None
+            assert entity.gmt_modified is not None
 
 
 def test_dao_create(dao, default_entity_dict):
diff --git a/dbgpt/serve/prompt/tests/test_service.py b/dbgpt/serve/prompt/tests/test_service.py
index 3992e89cb..98e896b00 100644
--- a/dbgpt/serve/prompt/tests/test_service.py
+++ b/dbgpt/serve/prompt/tests/test_service.py
@@ -75,7 +75,7 @@ def test_config_default_user(service: Service):
 def test_service_create(service: Service, default_entity_dict):
     entity: ServerResponse = service.create(ServeRequest(**default_entity_dict))
     with db.session() as session:
-        db_entity: ServeEntity = session.query(ServeEntity).get(entity.id)
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
         assert db_entity.id == entity.id
         assert db_entity.chat_scene == "chat_data"
         assert db_entity.sub_chat_scene == "excel"
@@ -92,7 +92,7 @@ def test_service_update(service: Service, default_entity_dict):
     service.create(ServeRequest(**default_entity_dict))
     entity: ServerResponse = service.update(ServeRequest(**default_entity_dict))
     with db.session() as session:
-        db_entity: ServeEntity = session.query(ServeEntity).get(entity.id)
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
         assert db_entity.id == entity.id
         assert db_entity.chat_scene == "chat_data"
         assert db_entity.sub_chat_scene == "excel"
@@ -109,7 +109,7 @@ def test_service_get(service: Service, default_entity_dict):
     service.create(ServeRequest(**default_entity_dict))
     entity: ServerResponse = service.get(ServeRequest(**default_entity_dict))
     with db.session() as session:
-        db_entity: ServeEntity = session.query(ServeEntity).get(entity.id)
+        db_entity: ServeEntity = session.get(ServeEntity, entity.id)
         assert db_entity.id == entity.id
         assert db_entity.chat_scene == "chat_data"
         assert db_entity.sub_chat_scene == "excel"
diff --git a/dbgpt/serve/utils/_template_files/default_serve_template/tests/test_models.py b/dbgpt/serve/utils/_template_files/default_serve_template/tests/test_models.py
index 218307f1a..1d111644d 100644
--- a/dbgpt/serve/utils/_template_files/default_serve_template/tests/test_models.py
+++ b/dbgpt/serve/utils/_template_files/default_serve_template/tests/test_models.py
@@ -1,5 +1,3 @@
-from typing import List
-
 import pytest
 
 from dbgpt.storage.metadata import db
@@ -39,11 +37,9 @@ def test_table_exist():
 
 
 def test_entity_create(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    # TODO: implement your test case
     with db.session() as session:
-        db_entity: ServeEntity = session.query(ServeEntity).get(entity.id)
-        assert db_entity.id == entity.id
+        entity = ServeEntity(**default_entity_dict)
+        session.add(entity)
 
 
 def test_entity_unique_key(default_entity_dict):
@@ -52,10 +48,8 @@ def test_entity_unique_key(default_entity_dict):
 
 
 def test_entity_get(default_entity_dict):
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity.id == entity.id
     # TODO: implement your test case
+    pass
 
 
 def test_entity_update(default_entity_dict):
@@ -65,10 +59,7 @@ def test_entity_update(default_entity_dict):
 
 def test_entity_delete(default_entity_dict):
     # TODO: implement your test case
-    entity: ServeEntity = ServeEntity.create(**default_entity_dict)
-    entity.delete()
-    db_entity: ServeEntity = ServeEntity.get(entity.id)
-    assert db_entity is None
+    pass
 
 
 def test_entity_all():
diff --git a/dbgpt/storage/chat_history/chat_history_db.py b/dbgpt/storage/chat_history/chat_history_db.py
index 080ee7492..029abadbf 100644
--- a/dbgpt/storage/chat_history/chat_history_db.py
+++ b/dbgpt/storage/chat_history/chat_history_db.py
@@ -105,12 +105,6 @@ def raw_delete(self, conv_uid: int):
             chat_history = chat_history.filter(ChatHistoryEntity.conv_uid == conv_uid)
             chat_history.delete()
 
-    def get_by_uid(self, conv_uid: str) -> ChatHistoryEntity:
-        # return ChatHistoryEntity.query.filter_by(conv_uid=conv_uid).first()
-
-        session = self.get_raw_session()
-        chat_history = session.query(ChatHistoryEntity)
-        chat_history = chat_history.filter(ChatHistoryEntity.conv_uid == conv_uid)
-        result = chat_history.first()
-        session.close()
-        return result
+    def get_by_uid(self, conv_uid: str) -> Optional[ChatHistoryEntity]:
+        with self.session(commit=False) as session:
+            return session.query(ChatHistoryEntity).filter_by(conv_uid=conv_uid).first()
diff --git a/dbgpt/storage/metadata/_base_dao.py b/dbgpt/storage/metadata/_base_dao.py
index 70f25197d..659e06b2e 100644
--- a/dbgpt/storage/metadata/_base_dao.py
+++ b/dbgpt/storage/metadata/_base_dao.py
@@ -51,7 +51,9 @@ def get_raw_session(self) -> Session:
 
 
         Example:
+
             .. code-block:: python
+
                 user = User(name="Edward Snowden")
                 session = self.get_raw_session()
                 session.add(user)
@@ -61,7 +63,7 @@ def get_raw_session(self) -> Session:
         return self._db_manager._session()
 
     @contextmanager
-    def session(self) -> Session:
+    def session(self, commit: Optional[bool] = True) -> Session:
         """Provide a transactional scope around a series of operations.
 
         If raise an exception, the session will be roll back automatically, otherwise it will be committed.
@@ -71,13 +73,16 @@ def session(self) -> Session:
                 with self.session() as session:
                     session.query(User).filter(User.name == 'Edward Snowden').first()
 
+        Args:
+            commit (Optional[bool], optional): Whether to commit the session. Defaults to True.
+
         Returns:
             Session: A session object.
 
         Raises:
             Exception: Any exception will be raised.
         """
-        with self._db_manager.session() as session:
+        with self._db_manager.session(commit=commit) as session:
             yield session
 
     def from_request(self, request: QUERY_SPEC) -> T:
diff --git a/dbgpt/storage/metadata/db_manager.py b/dbgpt/storage/metadata/db_manager.py
index be8f0b1ec..eddd8f4e7 100644
--- a/dbgpt/storage/metadata/db_manager.py
+++ b/dbgpt/storage/metadata/db_manager.py
@@ -1,8 +1,15 @@
 from __future__ import annotations
 
-import abc
 from contextlib import contextmanager
-from typing import TypeVar, Generic, Union, Dict, Optional, Type, Iterator, List
+from typing import (
+    TypeVar,
+    Generic,
+    Union,
+    Dict,
+    Optional,
+    Type,
+    ClassVar,
+)
 import logging
 from sqlalchemy import create_engine, URL, Engine
 from sqlalchemy import orm, inspect, MetaData
@@ -13,8 +20,6 @@
     declarative_base,
     DeclarativeMeta,
 )
-from sqlalchemy.orm.session import _PKIdentityArgument
-from sqlalchemy.orm.exc import UnmappedClassError
 
 from sqlalchemy.pool import QueuePool
 from dbgpt.util.string_utils import _to_str
@@ -27,16 +32,10 @@
 class _QueryObject:
     """The query object."""
 
-    def __init__(self, db_manager: "DatabaseManager"):
-        self._db_manager = db_manager
-
-    def __get__(self, obj, type):
-        try:
-            mapper = orm.class_mapper(type)
-            if mapper:
-                return type.query_class(mapper, session=self._db_manager._session())
-        except UnmappedClassError:
-            return None
+    def __get__(self, obj: Union[_Model, None], model_cls: type[_Model]):
+        return model_cls.query_class(
+            model_cls, session=model_cls.__db_manager__._session()
+        )
 
 
 class BaseQuery(orm.Query):
@@ -46,7 +45,9 @@ def paginate_query(
         """Paginate the query.
 
         Example:
+
             .. code-block:: python
+
                 from dbgpt.storage.metadata import db, Model
                 class User(Model):
                      __tablename__ = "user"
@@ -58,10 +59,6 @@ class User(Model):
                     pagination = session.query(User).paginate_query(page=1, page_size=10)
                     print(pagination)
 
-                # Or you can use the query object
-                with db.session() as session:
-                    pagination = User.query.paginate_query(page=1, page_size=10)
-                    print(pagination)
 
         Args:
             page (Optional[int], optional): The page number. Defaults to 1.
@@ -86,26 +83,12 @@ class User(Model):
 
 
 class _Model:
-    """Base class for SQLAlchemy declarative base model.
-
-    With this class, we can use the query object to query the database.
-
-    Examples:
-        .. code-block:: python
-            from dbgpt.storage.metadata import db, Model
-            class User(Model):
-                __tablename__ = "user"
-                id = Column(Integer, primary_key=True)
-                name = Column(String(50))
-                fullname = Column(String(50))
+    """Base class for SQLAlchemy declarative base model."""
 
-            with db.session() as session:
-                # User is an instance of _Model, and we can use the query object to query the database.
-                User.query.filter(User.name == "test").all()
-    """
+    __db_manager__: ClassVar[DatabaseManager]
+    query_class = BaseQuery
 
-    query_class = None
-    query: Optional[BaseQuery] = None
+    # query: Optional[BaseQuery] = _QueryObject()
 
     def __repr__(self):
         identity = inspect(self).identity
@@ -120,7 +103,9 @@ class DatabaseManager:
     """The database manager.
 
     Examples:
+
         .. code-block:: python
+
             from urllib.parse import quote_plus as urlquote, quote
             from dbgpt.storage.metadata import DatabaseManager, create_model
             db = DatabaseManager()
@@ -141,21 +126,25 @@ class User(Model):
                 session.add(User(name="test", fullname="test"))
                 # db will commit the session automatically default.
                 # session.commit()
-                print(User.query.filter(User.name == "test").all())
+                assert session.query(User).filter(User.name == "test").first().name == "test"
+
 
+            # More usage:
 
-            # Use CURDMixin APIs to create, update, delete, query the database.
             with db.session() as session:
-                User.create(**{"name": "test1", "fullname": "test1"})
-                User.create(**{"name": "test2", "fullname": "test1"})
-                users = User.all()
+                session.add(User(name="test1", fullname="test1"))
+                session.add(User(name="test2", fullname="test1"))
+                users = session.query(User).all()
                 print(users)
                 user = users[0]
-                user.update(**{"name": "test1_1111"})
+                user.name = "test1_1111"
+                session.merge(user)
+
                 user2 = users[1]
                 # Update user2 by save
                 user2.name = "test2_1111"
-                user2.save()
+                session.merge(user2)
+                session.commit()
                 # Delete user2
                 user2.delete()
     """
@@ -189,28 +178,65 @@ def is_initialized(self) -> bool:
         return self._engine is not None and self._session is not None
 
     @contextmanager
-    def session(self) -> Session:
+    def session(self, commit: Optional[bool] = True) -> Session:
         """Get the session with context manager.
 
-        If raise any exception, the session will roll back automatically, otherwise, the session will commit automatically.
+        This context manager handles the lifecycle of a SQLAlchemy session.
+        It automatically commits or rolls back transactions based on
+        the execution and handles session closure.
 
-        Example:
-            >>> with db.session() as session:
-            >>>     session.query(...)
+        The `commit` parameter controls whether the session should commit
+        changes at the end of the block. This is useful for separating
+        read and write operations.
 
-        Returns:
-            Session: The session.
+        Examples:
+
+            .. code-block:: python
+
+                # For write operations (insert, update, delete):
+                with db.session() as session:
+                    user = User(name="John Doe")
+                    session.add(user)
+                    # session.commit() is called automatically
+
+                # For read-only operations:
+                with db.session(commit=False) as session:
+                    user = session.query(User).filter_by(name="John Doe").first()
+                    # session.commit() is NOT called, as it's unnecessary for read operations
+
+        Args:
+            commit (Optional[bool], optional): Whether to commit the session.
+                If True (default), the session will commit changes at the end
+                of the block. Use False for read-only operations or when manual
+                control over commit is needed. Defaults to True.
+
+        Yields:
+            Session: The SQLAlchemy session object.
 
         Raises:
-            RuntimeError: The database manager is not initialized.
-            Exception: Any exception.
+            RuntimeError: Raised if the database manager is not initialized.
+            Exception: Propagates any exception that occurred within the block.
+
+        Important Notes:
+            - DetachedInstanceError: This error occurs when trying to access or
+              modify an instance that has been detached from its session.
+              DetachedInstanceError can occur in scenarios where the session is
+              closed, and further interaction with the ORM object is attempted,
+              especially when accessing lazy-loaded attributes. To avoid this:
+                a. Ensure required attributes are loaded before session closure.
+                b. Avoid closing the session before all necessary interactions
+                   with the ORM object are complete.
+                c. Re-bind the instance to a new session if further interaction
+                   is required after the session is closed.
+
         """
         if not self.is_initialized:
             raise RuntimeError("The database manager is not initialized.")
         session = self._session()
         try:
             yield session
-            session.commit()
+            if commit:
+                session.commit()
         except:
             session.rollback()
             raise
@@ -223,7 +249,7 @@ def _make_declarative_base(
         """Make the declarative base.
 
         Args:
-            base (DeclarativeMeta): The base class.
+            model (DeclarativeMeta): The base class.
 
         Returns:
             DeclarativeMeta: The declarative base.
@@ -232,7 +258,8 @@ def _make_declarative_base(
             model = declarative_base(cls=model, name="Model")
         if not getattr(model, "query_class", None):
             model.query_class = self.Query
-        model.query = _QueryObject(self)
+        # model.query = _QueryObject()
+        model.__db_manager__ = self
         return model
 
     def init_db(
@@ -242,6 +269,7 @@ def init_db(
         base: Optional[DeclarativeMeta] = None,
         query_class=BaseQuery,
         override_query_class: Optional[bool] = False,
+        session_options: Optional[Dict] = None,
     ):
         """Initialize the database manager.
 
@@ -251,18 +279,26 @@ def init_db(
             base (Optional[DeclarativeMeta]): The base class. Defaults to None.
             query_class (BaseQuery, optional): The query class. Defaults to BaseQuery.
             override_query_class (Optional[bool], optional): Whether to override the query class. Defaults to False.
+            session_options (Optional[Dict], optional): The session options. Defaults to None.
         """
+        if session_options is None:
+            session_options = {}
         self._db_url = db_url
         if query_class is not None:
             self.Query = query_class
         if base is not None:
             self._base = base
-            if not hasattr(base, "query") or override_query_class:
-                base.query = _QueryObject(self)
+            # if not hasattr(base, "query") or override_query_class:
+            #     base.query = _QueryObject()
             if not getattr(base, "query_class", None) or override_query_class:
                 base.query_class = self.Query
+            if not hasattr(base, "__db_manager__") or override_query_class:
+                base.__db_manager__ = self
         self._engine = create_engine(db_url, **(engine_args or {}))
-        session_factory = sessionmaker(bind=self._engine)
+
+        session_options.setdefault("class_", Session)
+        session_options.setdefault("query_cls", self.Query)
+        session_factory = sessionmaker(bind=self._engine, **session_options)
         self._session = scoped_session(session_factory)
         self._base.metadata.bind = self._engine
 
@@ -397,35 +433,12 @@ class BaseCRUDMixin(Generic[T]):
     __abstract__ = True
 
     @classmethod
-    def create(cls: Type[T], **kwargs) -> T:
-        instance = cls(**kwargs)
-        return instance.save()
-
-    @classmethod
-    def all(cls: Type[T]) -> List[T]:
-        return cls.query.all()
-
-    @classmethod
-    def get(cls: Type[T], ident: _PKIdentityArgument) -> Optional[T]:
-        """Get a record by its primary key identifier."""
-
-    def update(self: T, commit: Optional[bool] = True, **kwargs) -> T:
-        """Update specific fields of a record."""
-        for attr, value in kwargs.items():
-            setattr(self, attr, value)
-        return commit and self.save() or self
-
-    @abc.abstractmethod
-    def save(self: T, commit: Optional[bool] = True) -> T:
-        """Save the record."""
-
-    @abc.abstractmethod
-    def delete(self: T, commit: Optional[bool] = True) -> None:
-        """Remove the record from the database."""
+    def db(cls) -> DatabaseManager:
+        """Get the database manager."""
+        return cls.__db_manager__
 
 
 class BaseModel(BaseCRUDMixin[T], _Model, Generic[T]):
-
     """The base model class that includes CRUD convenience methods."""
 
     __abstract__ = True
@@ -438,28 +451,14 @@ class CRUDMixin(BaseCRUDMixin[T], Generic[T]):
         _db_manager: DatabaseManager = db_manager
 
         @classmethod
-        def set_db_manager(cls, db_manager: DatabaseManager):
+        def set_db(cls, db_manager: DatabaseManager):
             # TODO: It is hard to replace to user DB Connection
             cls._db_manager = db_manager
 
         @classmethod
-        def get(cls: Type[T], ident: _PKIdentityArgument) -> Optional[T]:
-            """Get a record by its primary key identifier."""
-            return cls._db_manager._session().get(cls, ident)
-
-        def save(self: T, commit: Optional[bool] = True) -> T:
-            """Save the record."""
-            session = self._db_manager._session()
-            session.add(self)
-            if commit:
-                session.commit()
-            return self
-
-        def delete(self: T, commit: Optional[bool] = True) -> None:
-            """Remove the record from the database."""
-            session = self._db_manager._session()
-            session.delete(self)
-            return commit and session.commit()
+        def db(cls) -> DatabaseManager:
+            """Get the database manager."""
+            return cls._db_manager
 
     class _NewModel(CRUDMixin[T], db_manager.Model, Generic[T]):
         """Base model class that includes CRUD convenience methods."""
@@ -478,6 +477,7 @@ def initialize_db(
     engine_args: Optional[Dict] = None,
     base: Optional[DeclarativeMeta] = None,
     try_to_create_db: Optional[bool] = False,
+    session_options: Optional[Dict] = None,
 ) -> DatabaseManager:
     """Initialize the database manager.
 
@@ -487,10 +487,11 @@ def initialize_db(
         engine_args (Optional[Dict], optional): The engine arguments. Defaults to None.
         base (Optional[DeclarativeMeta]): The base class. Defaults to None.
         try_to_create_db (Optional[bool], optional): Whether to try to create the database. Defaults to False.
+        session_options (Optional[Dict], optional): The session options. Defaults to None.
     Returns:
         DatabaseManager: The database manager.
     """
-    db.init_db(db_url, engine_args, base)
+    db.init_db(db_url, engine_args, base, session_options=session_options)
     if try_to_create_db:
         try:
             db.create_all()
diff --git a/dbgpt/storage/metadata/tests/test_base_dao.py b/dbgpt/storage/metadata/tests/test_base_dao.py
index a537188f2..9728fd482 100644
--- a/dbgpt/storage/metadata/tests/test_base_dao.py
+++ b/dbgpt/storage/metadata/tests/test_base_dao.py
@@ -100,7 +100,7 @@ def test_update_user(db: DatabaseManager, User: Type[BaseModel], user_dao, user_
 
     # Verify that the user is updated in the database
     with db.session() as session:
-        user = session.query(User).get(created_user_response.id)
+        user = session.get(User, created_user_response.id)
         assert user.age == 35
 
 
@@ -121,7 +121,7 @@ def test_update_user_partial(
 
     # Verify that the user is updated in the database
     with db.session() as session:
-        user = session.query(User).get(created_user_response.id)
+        user = session.get(User, created_user_response.id)
         assert user.age == user_req.age
         assert user.password == "newpassword"
 
diff --git a/dbgpt/storage/metadata/tests/test_db_manager.py b/dbgpt/storage/metadata/tests/test_db_manager.py
index a6ad24caa..aa67787fa 100644
--- a/dbgpt/storage/metadata/tests/test_db_manager.py
+++ b/dbgpt/storage/metadata/tests/test_db_manager.py
@@ -53,11 +53,10 @@ class User(Model):
 
     # Create
     with db.session() as session:
-        user = User.create(name="John Doe")
+        user = User(name="John Doe")
         session.add(user)
-        session.commit()
 
-    # Read
+    # # Read
     with db.session() as session:
         user = session.query(User).filter_by(name="John Doe").first()
         assert user is not None
@@ -65,12 +64,20 @@ class User(Model):
     # Update
     with db.session() as session:
         user = session.query(User).filter_by(name="John Doe").first()
-        user.update(name="Jane Doe")
+        user.name = "Mike Doe"
+        session.merge(user)
+    with db.session() as session:
+        user = session.query(User).filter_by(name="Mike Doe").first()
+        assert user is not None
+        session.query(User).filter(User.name == "John Doe").first() is None
+    #
+    # # Delete
+    with db.session() as session:
+        user = session.query(User).filter_by(name="Mike Doe").first()
+        session.delete(user)
 
-    # Delete
     with db.session() as session:
-        user = session.query(User).filter_by(name="Jane Doe").first()
-        user.delete()
+        assert len(session.query(User).all()) == 0
 
 
 def test_crud_mixins(db: DatabaseManager, Model: Type[BaseModel]):
@@ -80,20 +87,7 @@ class User(Model):
         name = Column(String(50))
 
     db.create_all()
-
-    # Create
-    user = User.create(name="John Doe")
-    assert User.get(user.id) is not None
-    users = User.all()
-    assert len(users) == 1
-
-    # Update
-    user.update(name="Bob Doe")
-    assert User.get(user.id).name == "Bob Doe"
-
-    user = User.get(user.id)
-    user.delete()
-    assert User.get(user.id) is None
+    User.db() == db
 
 
 def test_pagination_query(db: DatabaseManager, Model: Type[BaseModel]):
@@ -108,11 +102,10 @@ class User(Model):
         for i in range(30):
             user = User(name=f"User {i}")
             session.add(user)
-        session.commit()
-
-    users_page_1 = User.query.paginate_query(page=1, per_page=10)
-    assert len(users_page_1.items) == 10
-    assert users_page_1.total_pages == 3
+    with db.session() as session:
+        users_page_1 = session.query(User).paginate_query(page=1, per_page=10)
+        assert len(users_page_1.items) == 10
+        assert users_page_1.total_pages == 3
 
 
 def test_invalid_pagination(db: DatabaseManager, Model: Type[BaseModel]):
@@ -124,9 +117,11 @@ class User(Model):
     db.create_all()
 
     with pytest.raises(ValueError):
-        User.query.paginate_query(page=0, per_page=10)
+        with db.session() as session:
+            session.query(User).paginate_query(page=0, per_page=10)
     with pytest.raises(ValueError):
-        User.query.paginate_query(page=1, per_page=-1)
+        with db.session() as session:
+            session.query(User).paginate_query(page=1, per_page=-1)
 
 
 def test_set_model_db_manager(db: DatabaseManager, Model: Type[BaseModel]):
@@ -142,14 +137,19 @@ class User(Model):
         new_db = DatabaseManager.build_from(
             f"sqlite:///{filename}", base=Model, override_query_class=True
         )
-        Model.set_db_manager(new_db)
+        Model.set_db(new_db)
         new_db.create_all()
         db.create_all()
         assert list(new_db.metadata.tables.keys())[0] == "user"
-        User.create(**{"name": "John Doe"})
+        with new_db.session() as session:
+            user = User(name="John Doe")
+            session.add(user)
         with new_db.session() as session:
             assert session.query(User).filter_by(name="John Doe").first() is not None
         with db.session() as session:
             assert session.query(User).filter_by(name="John Doe").first() is None
-        assert len(User.query.all()) == 1
-        assert User.query.filter(User.name == "John Doe").first().name == "John Doe"
+        with new_db.session() as session:
+            session.query(User).all() == 1
+            session.query(User).filter(
+                User.name == "John Doe"
+            ).first().name == "John Doe"
diff --git a/examples/awel/simple_llm_client_example.py b/examples/awel/simple_llm_client_example.py
index 5751221c9..ee7f4292a 100644
--- a/examples/awel/simple_llm_client_example.py
+++ b/examples/awel/simple_llm_client_example.py
@@ -7,7 +7,7 @@
         Call with non-streaming response.
         .. code-block:: shell
 
-            DBGPT_SERVER="http://127.0.0.1:5000"
+            DBGPT_SERVER="http://127.0.0.1:5555"
             curl -X POST $DBGPT_SERVER/api/v1/awel/trigger/examples/simple_client/chat/completions \
             -H "Content-Type: application/json" -d '{
                 "model": "proxyllm",