opt-in for enable_prometheus_metrics

README.md

@@ -162,10 +162,10 @@ Mirroring CPU and Memory, the trait `disk_warning_threshold` signifies when to f
 ### Disable Prometheus Metrics
 
 There is a [known bug](https://github.com/jupyter-server/jupyter-resource-usage/issues/123) with Prometheus metrics which
-causes "lag"/pauses in the UI. To workaround this you can disable Prometheus metric reporting using:
-
+causes "lag"/pauses in the UI. Hence, the Prometheus metric reporting is disabled by default (for all versions > 1.1.1).  
+If you want to use the Prometheus metric reporting you need to enable it with:
 ```
---ResourceUseDisplay.enable_prometheus_metrics=False
+--ResourceUseDisplay.enable_prometheus_metrics=True
 ```
 
 ## Enable alternative frontend

jupyter_resource_usage/config.py

@@ -171,7 +171,7 @@ def _disk_path_default(self):
     ).tag(config=True)
 
     enable_prometheus_metrics = Bool(
-        default_value=True,
+        default_value=False,
         help="""
         Set to False in order to disable reporting of Prometheus style metrics.
         """,