Nginx "Requests Per Connection" chart

x-pack/plugins/infra/public/common/visualizations/constants.ts

@@ -33,6 +33,7 @@ import {
   memoryCache,
   nginxActiveConnections,
   nginxRequestRate,
+  nginxRequestsPerConnection,
   rx,
   tx,
   hostCount,
@@ -67,6 +68,7 @@ export const hostLensFormulas = {
   memoryCache,
   nginxActiveConnections,
   nginxRequestRate,
+  nginxRequestsPerConnection,
   rx,
   tx,
 };

x-pack/plugins/infra/public/common/visualizations/lens/dashboards/asset_details/host/nginx_charts.ts

@@ -4,9 +4,17 @@
  * 2.0; you may not use this file except in compliance with the Elastic License
  * 2.0.
  */
-import { nginxActiveConnections, nginxRequestRate } from '../metric_charts/nginx';
+import {
+  nginxActiveConnections,
+  nginxRequestRate,
+  nginxRequestsPerConnection,
+} from '../metric_charts/nginx';
 import type { XYConfig } from '../metric_charts/types';
 
-export const nginxStubstatusMetrics: XYConfig[] = [nginxActiveConnections, nginxRequestRate];
+export const nginxStubstatusMetrics: XYConfig[] = [
+  nginxActiveConnections,
+  nginxRequestRate,
+  nginxRequestsPerConnection,
+];
 
 export const nginxAccessMetrics: XYConfig[] = []; // TODO

x-pack/plugins/infra/public/common/visualizations/lens/dashboards/asset_details/metric_charts/nginx.ts

@@ -45,3 +45,18 @@ export const nginxActiveConnections: XYConfig = {
     axisLeft: XY_OVERRIDES.axisLeft,
   },
 };
+
+export const nginxRequestsPerConnection: XYConfig = {
+  id: 'RequestsPerConnection',
+  title: i18n.translate('xpack.infra.assetDetails.metricsCharts.nginx.RequestsPerConnection', {
+    defaultMessage: 'Requests Per Connection',
+  }),
+
+  layers: [
+    {
+      data: [hostLensFormulas.nginxRequestsPerConnection],
+      type: 'visualization',
+    },
+  ],
+  dataViewOrigin: 'metrics',
+};

x-pack/plugins/infra/public/common/visualizations/lens/formulas/host/index.ts

@@ -33,5 +33,6 @@ export { memoryFreeExcludingCache } from './memory_free_excluding_cache';
 export { memoryCache } from './memory_cache';
 export { nginxRequestRate } from './nginx_request_rate';
 export { nginxActiveConnections } from './nginx_active_connections';
+export { nginxRequestsPerConnection } from './nginx_requests_per_connection';
 export { rx } from './rx';
 export { tx } from './tx';

x-pack/plugins/infra/public/common/visualizations/lens/formulas/host/nginx_requests_per_connection.ts

@@ -0,0 +1,19 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import type { FormulaValueConfig } from '@kbn/lens-embeddable-utils';
+
+export const nginxRequestsPerConnection: FormulaValueConfig = {
+  label: 'Requests Per Connection',
+  value: 'max(nginx.stubstatus.requests) / max(nginx.stubstatus.handled)',
+  format: {
+    id: 'number',
+    params: {
+      decimals: 0,
+    },
+  },
+};