diff --git a/System-Metrics.md b/System-Metrics.md
index 42c67a9..f6aea9c 100644
--- a/System-Metrics.md
+++ b/System-Metrics.md
@@ -10,8 +10,12 @@ Just add a metrics address to `weed master` or `weed server` command line option
 
 ```
 weed master -metrics.address=<prometheus_gateway_host_name>:<prometheus_gateway_port>
+# example
+weed master -metrics.address=localhost:9091
 
 weed server -metrics.address=<prometheus_gateway_host_name>:<prometheus_gateway_port>
+# example
+weed server -metrics.address=localhost:9091
 ```
 
 The SeaweedFS filer or volume servers will read this metrics configuration from the master, and report the metrics directly to the Prometheus Gateway.