updates readme with show_host_usage feature

README.md

@@ -26,7 +26,12 @@ Kernel resource usage can be displayed in a sidebar for IPython kernels with
 
 The kernel usage is available for Notebook 7.x too which can be enabled at
 `View -> Right Sidebar -> Show Kernel Usage`. In the case of JupyterLab interface, it is
-enough to click `tachometer` icon on the right sidebar.
+enough to click `tachometer` icon on the right sidebar. 
+
+If you want to show or hide information from the Kernel Usage sidebar
+you can set `show_host_usage=False` to hide `Host CPU` and `Host Virtual Memory` information.
+
+![Screenshot for kernel usage with limited info](./doc/kernel-usage-limited-info.png)
 
 The package provides an alternative frontend for the `jupyter-resource-usage` metrics:
 
@@ -143,6 +148,11 @@ causes "lag"/pauses in the UI. To workaround this you can disable Prometheus met
 --ResourceUseDisplay.enable_prometheus_metrics=False
 ```
 
+### Show or Hide information from sidebar (tachometer)
+If you want to show or hide information from the Kernel Usage sidebar
+you can set `--ResourceUseDisplay.show_host_usage=False` to hide `Host CPU` and `Host Virtual Memory` information. The default is
+set as `True`.
+
 ## Enable alternative frontend
 
 By default, the alternative frontend is disabled. To enable it, users should go to