diff --git a/api/app.py b/api/app.py
index 2c9b59706b..2ea7c6d235 100644
--- a/api/app.py
+++ b/api/app.py
@@ -26,7 +26,6 @@ from werkzeug.exceptions import Unauthorized
 from commands import register_commands
 
 # DO NOT REMOVE BELOW
-from events import event_handlers
 from extensions import (
     ext_celery,
     ext_code_based_extension,
@@ -43,7 +42,6 @@ from extensions import (
 from extensions.ext_database import db
 from extensions.ext_login import login_manager
 from libs.passport import PassportService
-from models import account, dataset, model, source, task, tool, tools, web
 from services.account_service import AccountService
 
 # DO NOT REMOVE ABOVE
diff --git a/api/core/ops/ops_trace_manager.py b/api/core/ops/ops_trace_manager.py
index 2ce12f28d1..fbdc12331e 100644
--- a/api/core/ops/ops_trace_manager.py
+++ b/api/core/ops/ops_trace_manager.py
@@ -660,7 +660,7 @@ class TraceTask:
 
 trace_manager_timer = None
 trace_manager_queue = queue.Queue()
-trace_manager_interval = int(os.getenv("TRACE_QUEUE_MANAGER_INTERVAL", 1))
+trace_manager_interval = int(os.getenv("TRACE_QUEUE_MANAGER_INTERVAL", 5))
 trace_manager_batch_size = int(os.getenv("TRACE_QUEUE_MANAGER_BATCH_SIZE", 100))