chore(grafana): relative CPU usage

grafana/README.md

@@ -26,6 +26,9 @@ And don't forget to include the generated `risingwave-<xxx>-dashboard.json` in t
 ## Update without Restarting Grafana
 
 ```bash
+./risedev configure # make sure that grafana is turned on
+./risedev dev full
+
 ./update.sh
 ```
 

grafana/risingwave-dev-dashboard.dashboard.py

@@ -88,13 +88,24 @@ def section_cluster_node(outer_panels):
                             "cpu usage (total) - {{%s}} @ {{%s}}"
                             % (COMPONENT_LABEL, NODE_LABEL),
                         ),
-                        panels.target(
+                        panels.target( 
                             f"sum(rate({metric('process_cpu_seconds_total')}[$__rate_interval])) by ({COMPONENT_LABEL}, {NODE_LABEL}) / avg({metric('process_cpu_core_num')}) by ({COMPONENT_LABEL}, {NODE_LABEL}) > 0",
                             "cpu usage (avg per core) - {{%s}} @ {{%s}}"
                             % (COMPONENT_LABEL, NODE_LABEL),
                         ),
                     ],
                 ),
+                panels.timeseries_cpu(
+                    "Node CPU relative",
+                    "CPU usage relative to resource limit of container",
+                    [
+                        panels.target(
+                            "(sum(rate(container_cpu_usage_seconds_total{namespace=~\"$namespace\",container=~\"$component\",pod=~\"$pod\"}[$__rate_interval])) by (namespace, pod)) / (sum(kube_pod_container_resource_limits{namespace=~\"$namespace\",pod=~\"$pod\",container=~\"$component\", resource=\"cpu\"}) by (namespace, pod))", 
+                            "cpu usage @ {{%s}} @ {{%s}}"
+                            % (COMPONENT_LABEL, NODE_LABEL),
+                        ),
+                    ],
+                ),
                 panels.timeseries_count(
                     "Meta Cluster",
                     "RW cluster can configure multiple meta nodes to achieve high availability. One is the leader and the "