Elastic Load Balancing (ELB) metrics
Elastic Load Balancing automatically distributes incoming application traffic across multiple targets, such as Amazon EC2 instances, containers, and IP addresses. Classic ELB detects unhealthy instances and routes traffic only to healthy instances. Ensure your cloud platform is configured in SolarWinds Observability SaaS to collect this service's data. See Add an AWS cloud account. CloudWatch metrics must also be enabled for this service in the AWS Console for the metric data to be available.
Many of the collected metrics from AWS ELB entities are displayed as widgets in SolarWinds Observability explorers; additional metrics may be collected and available in the Metrics Explorer. You can also create an alert for when an entity's metric value moves out of a specific range. See Entities in SolarWinds Observability SaaS for information about entity types in SolarWinds Observability SaaS.
The following table lists AWS.ELB in the search box.
| Metric | Units | Description |
|---|---|---|
sw.metrics.healthscore | Percent (%) | Health state. The health state provides real-time insight into the overall health and performance of your monitored entities. The health state is determined based on anomalies detected for the entity, alerts triggered for the entity's metrics, and the status of the entity. The health state is displayed as one of the following four states and colors: Good, Moderate, Bad, or Unknown. You can determine the impact of the alerts, anomalies, and statuses on the health of an entity type by going to Settings > Health, and selecting a specific entity type. You can also customize the impact. To view the health of AWS ELB entities in the Metrics Explorer, filter the |
AWS.ELB.BackendConnectionErrors | Count | BackendConnectionErrors. The total number of connections that were not successfully established between the load balancer and the registered instances. |
AWS.ELB.BackendConnectionErrorsRate | Percent (%) | The rate at which connections between the load balancer and backend instances fail. It includes retries and health check-related errors. |
AWS.ELB.DesyncMitigationMode_NonCompliant_Request_Count | Count | The number of requests that do not comply with RFC 7230, which are potentially harmful and could lead to HTTP desync attacks. |
AWS.ELB.EstimatedALBActiveConnectionCount | Count | The total number of concurrent TCP connections from clients to the load balancer and from the load balancer to targets. |
AWS.ELB.EstimatedALBConsumedLCUs | Count per second | The number of Load Balancer Capacity Units (LCUs) consumed by the Application Load Balancer. |
AWS.ELB.EstimatedALBNewConnectionCount | Count | The number of new TCP connections initiated from clients to the load balancer. |
AWS.ELB.EstimatedProcessedBytes | bytes | The total number of bytes processed by the load balancer. |
AWS.ELB.HTTPCode_Backend_2XX | Count | The number of HTTP 2XX status codes returned by the backend instances. These status codes indicate successful responses. |
AWS.ELB.HTTPCode_Backend_3XX | Count | The number of HTTP 3XX status codes returned by the backend instances. These status codes indicate redirection responses. |
AWS.ELB.HTTPCode_Backend_4XX | Count | The number of HTTP 4XX status codes returned by the backend instances. These status codes indicate client error responses, such as Bad Request or Not Found. |
AWS.ELB.HTTPCode_Backend_5XX | Count | The number of HTTP 5XX status codes returned by the backend instances. These status codes indicate server error responses, such as Internal Server Error or Service Unavailable. |
AWS.ELB.HTTPCode_ELB_4XX | Count | HTTPCode_ELB_4XX. The total number of HTTP 4XX client error codes generated by the load balancer. |
AWS.ELB.HTTPCode_ELB_5XX | Count | HTTPCode_ELB_5XX. The total number of HTTP 5XX client error codes generated by the load balancer. |
AWS.ELB.HealthyHostCount | Count | healthyHostCount. The average number of healthy instances registered with your load balancer. |
AWS.ELB.HealthyHostPercent | Percent (%) | The percentage of healthy hosts in a target group over a specified period. |
AWS.ELB.HttpCodeELB5xxRate | Percent (%) | The rate of HTTP 5xx error codes (server errors) returned by the load balancer. |
AWS.ELB.Latency | milliseconds (ms) | The time it takes for the load balancer to respond to requests. It includes the time spent processing the request and the time spent waiting for a response from the backend server. |
AWS.ELB.Latency.p50 | milliseconds (ms) | The 50th percentile (median) of the latency metric. It represents the middle value of the latency distribution, meaning 50% of the requests have a lower latency and 50% have a higher latency. |
AWS.ELB.Latency.p95 | milliseconds (ms) | The 95th percentile of the latency metric. It represents the latency below which 95% of the requests fall, providing a sense of the higher end of the latency distribution. |
AWS.ELB.Latency.p99 | milliseconds (ms) | The 99th percentile of the latency metric. It represents the latency below which 99% of the requests fall, giving you an idea of the very high end of the latency distribution. |
AWS.ELB.RequestCount | Count | RequestCount. The total number of requests completed or connections made during the specified interval |
AWS.ELB.SpilloverCount | Count | SpilloverCount. The total number of requests that were rejected because the surge queue is full. |
AWS.ELB.SurgeQueueLength | Count | SurgeQueueLength. The total number of requests (HTTP listener) or connections (TCP listener) that are pending routing to a healthy instance. |
AWS.ELB.UnHealthyHostCount | Count | UnHealthyHostCount. The average number of unhealthy instances registered with your load balancer. An instance is considered unhealthy after it exceeds the unhealthy threshold configured for health checks. |