diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 00000000000..dd59a0ba054
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,14 @@
+# Copyright (c) 2021 vesoft inc. All rights reserved.
+#
+# This source code is licensed under Apache 2.0 License,
+# attached with Common Clause Condition 1.0, found in the LICENSES directory.
+
+# For more configuration details:
+# https://docs.codecov.io/docs/codecov-yaml
+
+# validate the configuration:
+# curl -X POST --data-binary @codecov.yml https://codecov.io/validate
+
+codecov:
+  allow_pseudo_compare: True
+  allow_coverage_offsets: True
diff --git a/conf/nebula-graphd.conf.default b/conf/nebula-graphd.conf.default
index 9951cf37896..fa406f8008a 100644
--- a/conf/nebula-graphd.conf.default
+++ b/conf/nebula-graphd.conf.default
@@ -81,3 +81,7 @@
 ########## memory ##########
 # System memory high watermark ratio
 --system_memory_high_watermark_ratio=0.8
+
+########## experimental feature ##########
+# if use experimental features
+--enable_experimental_feature=false
diff --git a/conf/nebula-graphd.conf.production b/conf/nebula-graphd.conf.production
index b3eebaf8dbf..26bc28827cf 100644
--- a/conf/nebula-graphd.conf.production
+++ b/conf/nebula-graphd.conf.production
@@ -79,3 +79,7 @@
 ########## memory ##########
 # System memory high watermark ratio
 --system_memory_high_watermark_ratio=0.8
+
+########## experimental feature ##########
+# if use experimental features
+--enable_experimental_feature=false