diff --git a/deployments/monitor/grafana/milvus-dashboard.json b/deployments/monitor/grafana/milvus-dashboard.json
index 6d960038e5..18317114a9 100644
--- a/deployments/monitor/grafana/milvus-dashboard.json
+++ b/deployments/monitor/grafana/milvus-dashboard.json
@@ -230,7 +230,7 @@
           "label": null,
           "logBase": 1,
           "max": null,
-          "min": null,
+          "min": "0",
           "show": true
         }
       ],