diff --git a/dbgpt/_private/config.py b/dbgpt/_private/config.py
index 84d79494f..cd7936a60 100644
--- a/dbgpt/_private/config.py
+++ b/dbgpt/_private/config.py
@@ -327,6 +327,10 @@ class Config(metaclass=Singleton):
         self.FILE_SERVER_LOCAL_STORAGE_PATH = os.getenv(
             "FILE_SERVER_LOCAL_STORAGE_PATH"
         )
+        # multi-instance flag
+        self.WEBSERVER_MULTI_INSTANCE = (
+            os.getenv("MULTI_INSTANCE", "False").lower() == "true"
+        )
 
     @property
     def local_db_manager(self) -> "ConnectorManager":
diff --git a/dbgpt/app/component_configs.py b/dbgpt/app/component_configs.py
index 29c9e59be..a8a0f24d1 100644
--- a/dbgpt/app/component_configs.py
+++ b/dbgpt/app/component_configs.py
@@ -52,7 +52,7 @@ def initialize_components(
         param, system_app, embedding_model_name, embedding_model_path
     )
     _initialize_rerank_model(param, system_app, rerank_model_name, rerank_model_path)
-    _initialize_model_cache(system_app)
+    _initialize_model_cache(system_app, param.port)
     _initialize_awel(system_app, param)
     # Initialize resource manager of agent
     _initialize_resource_manager(system_app)
@@ -62,7 +62,7 @@ def initialize_components(
     register_serve_apps(system_app, CFG, param.port)
 
 
-def _initialize_model_cache(system_app: SystemApp):
+def _initialize_model_cache(system_app: SystemApp, port: int):
     from dbgpt.storage.cache import initialize_cache
 
     if not CFG.MODEL_CACHE_ENABLE:
@@ -72,6 +72,8 @@ def _initialize_model_cache(system_app: SystemApp):
     storage_type = CFG.MODEL_CACHE_STORAGE_TYPE or "disk"
     max_memory_mb = CFG.MODEL_CACHE_MAX_MEMORY_MB or 256
     persist_dir = CFG.MODEL_CACHE_STORAGE_DISK_DIR or MODEL_DISK_CACHE_DIR
+    if CFG.WEBSERVER_MULTI_INSTANCE:
+        persist_dir = f"{persist_dir}_{port}"
     initialize_cache(system_app, storage_type, max_memory_mb, persist_dir)
 
 
diff --git a/dbgpt/app/initialization/serve_initialization.py b/dbgpt/app/initialization/serve_initialization.py
index fcdf6600f..b88d1d215 100644
--- a/dbgpt/app/initialization/serve_initialization.py
+++ b/dbgpt/app/initialization/serve_initialization.py
@@ -94,6 +94,8 @@ def register_serve_apps(system_app: SystemApp, cfg: Config, webserver_port: int)
     local_storage_path = (
         cfg.FILE_SERVER_LOCAL_STORAGE_PATH or FILE_SERVER_LOCAL_STORAGE_PATH
     )
+    if cfg.WEBSERVER_MULTI_INSTANCE:
+        local_storage_path = f"{local_storage_path}_{webserver_port}"
     # Set config
     system_app.config.set(
         f"{FILE_SERVE_CONFIG_KEY_PREFIX}local_storage_path", local_storage_path