[DOC-13153]: Feedback on Query Service Metrics | Couchbase Docs (#3818)

* [DOC-13153]: Feedback on Query Service Metrics | Couchbase Docs

Added a short example: using CURL to retrieve metrics.

Signed-off-by: Ray Offiah <[email protected]>

* Update query-service-metrics.adoc

Co-authored-by: Simon Dew <[email protected]>

---------

Signed-off-by: Ray Offiah <[email protected]>
Co-authored-by: Simon Dew <[email protected]>

Author: RayOffiah

modules/metrics-reference/pages/query-service-metrics.adoc

@@ -6,6 +6,20 @@
 
 The following Query Service metrics can be queried by means of the REST APIs described in xref:rest-api:rest-statistics.adoc[Statistics].
 
+As a brief introduction however, this is how you would go about building a REST command for the `n1ql_active_requests` metric.
+
+'''
+.Using CURL to retrieve Query Service metrics
+
+Run the following command from your shell console to get the total number of active requests.
+
+[source, shell]
+----
+curl -X GET --location "http://localhost:8091/pools/default/stats/range/n1ql_active_requests" \
+    --basic --user Administrator:password
+----
+
+'''
 See xref:query-service-metrics-cross-reference.adoc[] if you are looking for a metric name you know from an alternative supported or legacy tool.
 
 [template,attachment$n1ql_metrics_metadata.json]