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Application Load Balancer ALB
Operation Guide
Monitoring
Monitoring Metrics Explanation

Description of ALB Monitoring Items

When your ALB encounters network problems such as request timeouts and traffic rate limiting, or if you want to gain a deeper understanding of the load and performance of ALB, you can monitor key indicators of ALB to achieve real-time tracking, accurate analysis, and rapid location of issues, thereby ensuring stable and efficient operation of the service.

Instance Monitoring (Intranet)

Monitoring ItemsDescription
Intranet Ingress Bandwidth MonitoringAverage bandwidth used by the client to access the load balancer instance through the intranet
Intranet Egress BandwidthAverage bandwidth used by the load balancer to access the intranet.
Intranet Outbound Packet CountThe number of packets that the load balancer sends to the client through the intranet.
Intranet Inbound Packet CountThe number of packets that the client sends to the load balancer through the intranet.

Instance Monitoring (Internet)

Monitoring ItemsDescription
Network IngressAverage bandwidth used by the client to access the load balancer through the internet.
Network EgressThe average bandwidth used by the load balancer to access the internet.
Inbound Bandwidth UtilizationBandwidth usage rate of the client accessing the load balancer through the internet.
Outbound Bandwidth UtilizationBandwidth usage rate of the load balancer when accessing the internet.
Peak Outbound BandwidthPeak bandwidth of the load balancer when accessing the internet.
Peak Inbound BandwidthPeak bandwidth of the client when accessing the load balancer through the internet.
Outbound Packet CountThe number of packets that the load balancer sends to the client through the internet.
Inbound Packet CountThe number of packets that the client sends to the load balancer through the internet.
Outbound Packet LossPackets discarded by the load balancer when accessing the internet.
Inbound Packet LossPackets discarded by the client when accessing the load balancer through the internet.
Outbound Packet Loss PercentageThe percentage of packets discarded by the load balancer to the total outbound packets
Inbound Packet Loss PercentageThe percentage of packets discarded by the client to the total outbound packets

Listener Monitoring

Monitor ItemsDescription
Listener Connection CountThe number of active connections from clients to the listener
New Connection CountThe number of new connections from clients to the listener.
HTTP 2XXThe number of 2xx status codes returned by the load balancer
HTTP 3XXThe number of 3xx status codes returned by the load balancer
HTTP 4XXThe number of 4xx status codes returned by the load balancer
HTTP 5XXThe number of 5xx status codes returned by the load balancer
HTTP Other Status CodesThe number of status codes returned by the load balancer other than 5xx, 3xx, 2xx, 4xx
Requests Per SecondThe number of requests to the load balancer.
Node Failure PercentageThe percentage of abnormal health checks of the listener to the total number of nodes
Average Request TimeAverage request time of the load balancer
Backend Average Response TimeAverage response time of the backend service nodes of the load balancer