To view a list of dashboards forallyour load balancers, in theGCP Dashboardslist, click the dashboard namedGoogle Cloud Load Balancers.
To view a specific load balancer's dashboard, locate the load balancer in the list
and click its name.
To view the predefined dashboards for only your load balancers, select the
appropriate dashboard.
In addition to the predefined dashboards in Monitoring, you can
create custom dashboards, set up alerts, and query the metrics through theCloud Monitoring API.
Backend latency DELTA, DISTRIBUTION, ms A distribution calculated from the sum of latencies of each extension invocation between the load balancer and the callout backend service. Sampled every 60 seconds.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["This page describes how to monitor Application Load Balancer extension backend\nservices that are\n[configured using Service Extensions](/service-extensions/docs/configure-callout-backend-service).\n\nFor a product overview, see [Service Extensions overview](/service-extensions/docs/overview).\n\nView a Monitoring dashboard\n\n\nApplication Load Balancers export monitoring data to\n[Cloud Monitoring](/monitoring/docs).\n\nUse Monitoring metrics for the following purposes:\n\n- Evaluating a load balancer's configuration, usage, and performance\n- Troubleshooting problems\n- Improving resource utilization and user experience\n\nTo view a predefined dashboard, follow these steps:\n\n1. In the Google Cloud console, go to the **Dashboards overview** page.\n\n [Go to Dashboards overview](https://console.cloud.google.com/monitoring/dashboards)\n2. In the **Categories** section, click **GCP** .\n - To view a list of dashboards for *all* your load balancers, in the **GCP Dashboards** list, click the dashboard named **Google Cloud Load Balancers**. To view a specific load balancer's dashboard, locate the load balancer in the list and click its name.\n - To view the predefined dashboards for only your load balancers, select the appropriate dashboard.\n\nIn addition to the predefined dashboards in Monitoring, you can\ncreate custom dashboards, set up alerts, and query the metrics through the\n[Cloud Monitoring API](/monitoring/api).\n\nFor more information, see the \"Monitor and troubleshoot\" pages of the\nCloud Load Balancing documentation---for example,\n[Internal Application Load Balancer logging and monitoring](/load-balancing/docs/l7-internal/monitoring).\n\n\u003cbr /\u003e\n\nMonitoring metrics for callouts\n\nYou can monitor the following metrics for callout backend services.\n\n\nThese metrics have the prefix `loadbalancing.googleapis.com/`. The prefix is omitted\nfrom the entries in the table.\n\n| Metric type | Display name Kind, Type, Unit Description |\n|---------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `https/backend_request_count`, `https/external/regional/backend_request_count`, `https/internal/backend_request_count` | Backend request count `DELTA`, `INT64`, `1` The number of times that a callout backend service is called from the Application Load Balancer. |\n| `https/backend_request_bytes_count`, `https/external/regional/backend_request_bytes_count`, `https/internal/backend_request_bytes_count` | Backend request bytes `DELTA`, `INT64`, `By` The number of bytes sent from the load balancer to the callout backend service. |\n| `https/backend_response_bytes_count`, `https/external/regional/backend_response_bytes_count`, `https/internal/backend_response_bytes_count` | Backend response bytes `DELTA`, `INT64`, `By` The number of bytes received by the load balancer from the extension backend. |\n| `https/backend_latencies`, `https/external/regional/backend_latencies`, `https/internal/backend_latencies` | Backend latency `DELTA`, `DISTRIBUTION`, `ms` A distribution calculated from the sum of latencies of each extension invocation between the load balancer and the callout backend service. Sampled every 60 seconds. |\n\n\u003cbr /\u003e\n\nWhat's next\n\n- [View log messages for callouts](/service-extensions/docs/view-callout-log-messages)"]]
