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Application Load Balancer

Monitoring Metric Description

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Last updated: 2026-09-28 16:39:10
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ALB Instance Dimension

Metric Name
Metric Name
Metric Description
Unit
Statistical Granularity (seconds)
LoadBalancerHttpCode2xx
2xx Status Codes Returned by ALB
Number of 2xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerUpstreamResponseTime
Average Backend Response Time
Average time taken for ALB to receive the complete response from the real server in the statistical period.
ms
60, 300, 3600, and 86400
LoadBalancerUnHealthyRsCount
Number of Unhealthy Real Servers
Number of real servers with health check exceptions (unhealthy) under the ALB instance at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
LoadBalancerNetworkActiveConnection
Number of Active Connections
Number of active connections from clients to the ALB instance at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
LoadBalancerNetworkIdleConnection
Number of Inactive Connections
Number of inactive connections from clients to the ALB instance at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
LoadBalancerNetworkConnection
Number of Concurrent Connections
Number of concurrent connections from clients to the ALB instance at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
LoadBalancerNetworkOpenedConnection
Number of New Connections
Number of new connections from clients to the ALB instance in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerNetworkDroppedConnection
Number of Discarded Connections
Number of connections discarded on the ALB instance in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerNetworkBandwidthTransmit
Outbound Bandwidth
Bandwidth used by traffic from the ALB instance to clients (outbound) in the statistical period.
Mbps
60, 300, 3600, and 86400
LoadBalancerNetworkBandwidthReceive
Inbound Bandwidth
Bandwidth used by traffic from clients to the ALB instance (inbound) in the statistical period.
Mbps
60, 300, 3600, and 86400
LoadBalancerHttpCode3xx
3xx status codes returned by ALB
Number of 3xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCode4xx
4xx Status Codes Returned by ALB
Number of 4xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCode5xx
5xx Status Codes Returned by ALB
Number of 5xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCode500
500 Status Codes Returned by ALB
Number of 500 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCode502
502 Status Codes Returned by ALB
Number of 502 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCode503
503 Status Codes Returned by ALB
Number of 503 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCode504
504 Status Codes Returned by ALB
Number of 504 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream2xx
2xx Status Codes Returned by Real Servers
Number of 2xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream3xx
3xx Status Codes Returned by Real Servers
Number of 3xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream4xx
4xx Status Codes Returned by Real Servers
Number of 4xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream5xx
5xx Status Codes Returned by Real Servers
Number of 5xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerClientTlsNegotiationError
Number of TLS Handshake Failures
Number of connections with TLS handshake failures between clients and the ALB instance in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerUpstreamTlsNegotiationError
Number of Backend TLS Handshake Failures
Number of connections with TLS handshake failures between the ALB instance and the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerUpstreamConnectionError
Number of Backend Connection Failures
Number of failed connection attempts from the ALB instance to the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpFixedResponse
Number of Custom Responses
Number of custom fixed responses returned by the ALB instance according to the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHttpRedirect
Number of Redirects
Number of redirect actions performed by the ALB instance according to the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerQps
Number of Requests per Second on ALB
Number of received Queries Per Second (QPS) for the ALB instance in the statistical period.
Count/second
60, 300, 3600, and 86400
LoadBalancerDroppedRequest
Number of Requests Discarded by ALB
Number of requests discarded by the ALB instance in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerNonStickyRequest
Number of Non-Sticky Requests
Number of requests that are rescheduled because they do not hit session persistence (non-sticky) on the ALB instance in the statistical period.
Count/minute
60, 300, 3600, and 86400
LoadBalancerHealthyRsCount
Number of Healthy Real Servers
Number of real servers that pass the health check (healthy) under the ALB instance at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
LoadBalancerNetworkTrafficTransmit
Outbound Traffic
Total traffic from the ALB instance to clients (outbound) in the statistical period.
MiB
60, 300, 3600, and 86400
LoadBalancerNetworkTrafficReceive
Inbound Traffic
Total traffic from clients to the ALB instance (inbound) in the statistical period.
MiB
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream2xxRatio
Proportion of 2xx Status Codes Returned by Real Servers
Proportion of 2xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream3xxRatio
Proportion of 3xx Status Codes Returned by Real Servers
Proportion of 3xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream4xxRatio
Proportion of 4xx Status Codes Returned by Real Servers
Proportion of 4xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
LoadBalancerHttpCodeUpstream5xxRatio
Proportion of 5xx Status Codes Returned by Real Servers
Proportion of 5xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
LoadBalancerRequestTime
Average Request Latency
Average latency from when the ALB instance receives a request from clients to when it returns the response to clients in the statistical period.
ms
60, 300, 3600, and 86400
LoadBalancerConsumedLcu
Number of Consumed Postpaid LCUs
Number of postpaid Load Balancer Capacity Units (LCUs) consumed by the ALB instance in the statistical period.
Count
60, 300, 3600, and 86400

Listener Dimension

Metric Name
Metric Name
Metric Description
Unit
Statistical Granularity (seconds)
ListenerHttpCode2xx
2xx Status Codes Returned by ALB
Number of 2xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerNetworkActiveConnection
Number of Active Connections
Number of active connections from clients to the listener at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ListenerNetworkIdleConnection
Number of Inactive Connections
Number of inactive connections from clients to the listener at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ListenerNetworkConnection
Number of Concurrent Connections
Number of concurrent connections from clients to the listener at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ListenerNetworkOpenedConnection
Number of New Connections
Number of new connections from clients to the listener in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerNetworkDroppedConnection
Number of Discarded Connections
Number of connections discarded on the listener in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerNetworkBandwidthTransmit
Outbound Bandwidth
Bandwidth used by traffic from the listener to clients (outbound) in the statistical period.
Mbps
60, 300, 3600, and 86400
ListenerNetworkBandwidthReceive
Inbound Bandwidth
Bandwidth used by traffic from clients to the listener (inbound) in the statistical period.
Mbps
60, 300, 3600, and 86400
ListenerHttpCode3xx
3xx Status Codes Returned by ALB
Number of 3xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCode4xx
4xx Status Codes Returned by ALB
Number of 4xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCode5xx
5xx Status Codes Returned by ALB
Number of 5xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCode500
500 Status Codes Returned by ALB
Number of 500 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCode502
502 Status Codes Returned by ALB
Number of 502 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCode503
503 Status Codes Returned by ALB
Number of 503 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCode504
504 Status Codes Returned by ALB
Number of 504 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCodeUpstream2xx
2xx Status Codes Returned by Real Servers
Number of 2xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCodeUpstream3xx
3xx Status Codes Returned by Real Servers
Number of 3xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCodeUpstream4xx
4xx Status Codes Returned by Real Servers
Number of 4xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpCodeUpstream5xx
5xx Status Codes Returned by Real Servers
Number of 5xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerClientTlsNegotiationError
Number of TLS Handshake Failures
Number of connections with TLS handshake failures between clients and the listener in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerUpstreamTlsNegotiationError
Number of Backend TLS Handshake Failures
Number of connections with TLS handshake failures between the listener and the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerUpstreamConnectionError
Number of Backend Connection Failures
Number of failed connection attempts from the listener to the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpFixedResponse
Number of Custom Responses
Number of custom fixed responses returned by the listener according to the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerHttpRedirect
Number of Redirects
Number of redirect actions performed by the listener according to the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerQps
Number of Requests per Second on ALB
Number of received QPS for the listener in the statistical period.
Count/second
60, 300, 3600, and 86400
ListenerDroppedRequest
Number of Requests Discarded by ALB
Number of requests discarded by the listener in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerNonStickyRequest
Number of Non-Sticky Requests
Number of requests that are rescheduled because they do not hit session persistence (non-sticky) on the listener in the statistical period.
Count/minute
60, 300, 3600, and 86400
ListenerUpstreamResponseTime
Average Backend Response Time
Average time taken for ALB to receive the complete response from the real server in the statistical period.
ms
60, 300, 3600, and 86400
ListenerHealthyRsCount
Number of Healthy Real Servers
Number of real servers that pass the health check (healthy) under the listener at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ListenerUnHealthyRsCount
Number of Unhealthy Real Servers
Number of real servers with health check exceptions (unhealthy) under the listener at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ListenerNetworkTrafficTransmit
Outbound Traffic
Total traffic from the listener to clients (outbound) in the statistical period.
MiB
60, 300, 3600, and 86400
ListenerNetworkTrafficReceive
Inbound Traffic
Total traffic from clients to the listener (inbound) in the statistical period.
MiB
60, 300, 3600, and 86400
ListenerHttpCodeUpstream2xxRatio
Proportion of 2xx Status Codes Returned by Real Servers
Proportion of 2xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ListenerHttpCodeUpstream3xxRatio
Proportion of 3xx Status Codes Returned by Real Servers
Proportion of 3xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ListenerHttpCodeUpstream4xxRatio
Proportion of 4xx Status Codes Returned by Real Servers
Proportion of 4xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ListenerHttpCodeUpstream5xxRatio
Proportion of 5xx Status Codes Returned by Real Servers
Proportion of 5xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ListenerRequestTime
Average Request Latency
Average latency from when the ALB instance receives a request from clients to when it returns the response to clients in the statistical period.
ms
60, 300, 3600, and 86400
ListenerConnectionLcu
Number of Postpaid LCUs for Concurrent Connections
Number of postpaid LCUs calculated based on the concurrent connections dimension in the statistical period.
Count
60, 300, 3600, and 86400
ListenerOpenedConnectionLcu
Number of Postpaid LCUs for New Connections
Number of postpaid LCUs calculated based on the new connections dimension in the statistical period.
Count
60, 300, 3600, and 86400
ListenerProcessedTrafficLcu
Number of Postpaid LCUs for Processed Traffic
Number of postpaid LCUs calculated based on the processed traffic dimension in the statistical period.
Count
60, 300, 3600, and 86400
ListenerRuleEvaluationLcu
Number of Postpaid LCUs for Rule Evaluations
Number of postpaid LCUs calculated based on the rule evaluations dimension in the statistical period.
Count
60, 300, 3600, and 86400
ListenerConsumedLcu
Number of Consumed Postpaid LCUs
Number of postpaid LCUs consumed by the listener in the statistical period.
Count
60, 300, 3600, and 86400

Forwarding Rule Dimension

Metric Name
Metric Name
Metric Description
Unit
Statistical Granularity (seconds)
RuleHttpCode2xx
2xx Status Codes Returned by ALB
Number of 2xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode3xx
3xx Status Codes Returned by ALB
Number of 3xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode4xx
4xx Status Codes Returned by ALB
Number of 4xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode5xx
5xx Status Codes Returned by ALB
Number of 5xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode500
500 Status Codes Returned by ALB
Number of 500 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode502
502 Status Codes Returned by ALB
Number of 502 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode503
503 Status Codes Returned by ALB
Number of 503 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCode504
504 Status Codes Returned by ALB
Number of 504 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCodeUpstream2xx
2xx Status Codes Returned by Real Servers
Number of 2xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCodeUpstream3xx
3xx Status Codes Returned by Real Servers
Number of 3xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCodeUpstream4xx
4xx Status Codes Returned by Real Servers
Number of 4xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCodeUpstream5xx
5xx Status Codes Returned by Real Servers
Number of 5xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpCodeUpstream2xxRatio
Proportion of 2xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 2xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
RuleHttpCodeUpstream3xxRatio
Proportion of 3xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 3xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
RuleHttpCodeUpstream4xxRatio
Proportion of 4xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 4xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
RuleHttpCodeUpstream5xxRatio
Proportion of 5xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 5xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
RuleUpstreamTlsNegotiationError
Number of Backend TLS Handshake Failures
Number of connections with TLS handshake failures between the forwarding rule and the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleUpstreamConnectionError
Number of Backend Connection Failures
Number of failed connection attempts from the forwarding rule to the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpFixedResponse
Number of Custom Responses
Number of custom fixed responses returned by the forwarding rule according to the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleHttpRedirect
Number of Redirects
Number of redirect actions performed by the forwarding rule according to the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleQps
Number of Requests per Second on ALB
Number of received QPS for the forwarding rule in the statistical period.
Count/second
60, 300, 3600, and 86400
RuleDroppedRequest
Number of Requests Discarded by ALB
Number of requests discarded by the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleNonStickyRequest
Number of Non-Sticky Requests
Number of requests that are rescheduled because they do not hit session persistence (non-sticky) on the forwarding rule in the statistical period.
Count/minute
60, 300, 3600, and 86400
RuleUpstreamResponseTime
Average Backend Response Time
Average time taken for ALB to receive the complete response from the real server in the statistical period.
ms
60, 300, 3600, and 86400
RuleHealthyRsCount
Number of Healthy Real Servers
Number of real servers that pass the health check (healthy) under the forwarding rule at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
RuleUnHealthyRsCount
Number of Unhealthy Real Servers
Number of real servers with health check exceptions (unhealthy) under the forwarding rule at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
RuleRequestTime
Average Request Latency
Average latency from when the ALB instance receives a request from clients to when it returns the response to clients in the statistical period.
ms
60, 300, 3600, and 86400

Target Group Dimension

Metric Name
Metric Name
Metric Description
Unit
Statistical Granularity (seconds)
TargetGroupHttpCode2xx
2xx Status Codes Returned by ALB
Number of 2xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode3xx
3xx Status Codes Returned by ALB
Number of 3xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode4xx
4xx Status Codes Returned by ALB
Number of 4xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode5xx
5xx Status Codes Returned by ALB
Number of 5xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode500
500 Status Codes Returned by ALB
Number of 500 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode502
502 Status Codes Returned by ALB
Number of 502 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode503
503 Status Codes Returned by ALB
Number of 503 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCode504
504 Status Codes Returned by ALB
Number of 504 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream2xx
2xx Status Codes Returned by Real Servers
Number of 2xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream3xx
3xx Status Codes Returned by Real Servers
Number of 3xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream4xx
4xx Status Codes Returned by Real Servers
Number of 4xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream5xx
5xx Status Codes Returned by Real Servers
Number of 5xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream2xxRatio
Proportion of 2xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 2xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream3xxRatio
Proportion of 3xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 3xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream4xxRatio
Proportion of 4xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 4xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
TargetGroupHttpCodeUpstream5xxRatio
Proportion of 5xx Status Codes Returned by Real Servers for a Forwarding Rule
Proportion of 5xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
TargetGroupUpstreamTlsNegotiationError
Number of Backend TLS Handshake Failures
Number of connections with TLS handshake failures between the target group and the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupUpstreamConnectionError
Number of Backend Connection Failures
Number of failed connection attempts from the target group to the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupQps
Number of Requests per Second on ALB
Number of received QPS for the target group in the statistical period.
Count/second
60, 300, 3600, and 86400
TargetGroupDroppedRequest
Number of Requests Discarded by ALB
Number of requests discarded by the target group in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupNonStickyRequest
Number of Non-Sticky Requests
Number of requests that are rescheduled because they do not hit session persistence (non-sticky) on the target group in the statistical period.
Count/minute
60, 300, 3600, and 86400
TargetGroupUpstreamResponseTime
Average Backend Response Time
Average time taken for ALB to receive the complete response from the real server in the statistical period.
ms
60, 300, 3600, and 86400
TargetGroupHealthyRsCount
Number of Healthy Real Servers
Number of real servers that pass the health check (healthy) under the target group at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
TargetGroupUnHealthyRsCount
Number of Unhealthy Real Servers
Number of real servers with health check exceptions (unhealthy) under the target group at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
TargetGroupRequestTime
Average Request Latency
Average latency from when the ALB instance receives a request from clients to when it returns the response to clients in the statistical period.
ms
60, 300, 3600, and 86400

AZ Dimension

Metric Name
Metric Name
Metric Description
Unit
Statistical Granularity (seconds)
ZoneHttpCode2xx
2xx Status Codes Returned by ALB
Number of 2xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneNetworkActiveConnection
Number of Active Connections
Number of active connections from clients to the AZ at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ZoneNetworkIdleConnection
Number of Inactive Connections
Number of inactive connections from clients to the AZ at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ZoneNetworkConnection
Number of Concurrent Connections
Number of concurrent connections from clients to the AZ at a certain time point in the statistical period.
Count
60, 300, 3600, and 86400
ZoneNetworkOpenedConnection
Number of New Connections
Number of new connections from clients to the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneNetworkDroppedConnection
Number of Discarded Connections
Number of connections discarded in the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneNetworkBandwidthTransmit
Outbound Bandwidth
Bandwidth used by traffic from the AZ to clients (outbound) in the statistical period.
Mbps
60, 300, 3600, and 86400
ZoneNetworkBandwidthReceive
Inbound Bandwidth
Bandwidth used by traffic from clients to the AZ (inbound) in the statistical period.
Mbps
60, 300, 3600, and 86400
ZoneHttpCode3xx
3xx Status Codes Returned by ALB
Number of 3xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCode4xx
4xx Status Codes Returned by ALB
Number of 4xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCode5xx
5xx Status Codes Returned by ALB
Number of 5xx status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCode500
500 Status Codes Returned by ALB
Number of 500 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCode502
502 Status Codes Returned by ALB
Number of 502 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCode503
503 Status Codes Returned by ALB
Number of 503 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCode504
504 Status Codes Returned by ALB
Number of 504 status codes returned by ALB to clients in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCodeUpstream2xx
2xx Status Codes Returned by Real Servers
Number of 2xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCodeUpstream3xx
3xx Status Codes Returned by Real Servers
Number of 3xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCodeUpstream4xx
4xx Status Codes Returned by Real Servers
Number of 4xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpCodeUpstream5xx
5xx Status Codes Returned by Real Servers
Number of 5xx status codes returned by the real server to ALB in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneClientTlsNegotiationError
Number of TLS Handshake Failures
Number of connections with TLS handshake failures between clients and the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneUpstreamTlsNegotiationError
Number of Backend TLS Handshake Failures
Number of connections with TLS handshake failures between the AZ and the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneUpstreamConnectionError
Number of Backend Connection Failures
Number of failed connection attempts from the AZ to the real server in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpFixedResponse
Number of Custom Responses
Number of custom fixed responses returned according to the forwarding rule in the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneHttpRedirect
Number of Redirects
Number of redirect actions performed according to the forwarding rule in the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneQps
Number of Requests per Second on ALB
Number of received QPS for the AZ in the statistical period.
Count/second
60, 300, 3600, and 86400
ZoneDroppedRequest
Number of Requests Discarded by ALB
Number of requests discarded by the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneNonStickyRequest
Number of Non-Sticky Requests
Number of requests that are rescheduled because they do not hit session persistence (non-sticky) on the AZ in the statistical period.
Count/minute
60, 300, 3600, and 86400
ZoneUpstreamResponseTime
Average Backend Response Time
Average time taken for ALB to receive the complete response from the real server in the statistical period.
ms
60, 300, 3600, and 86400
ZoneNetworkTrafficTransmit
Outbound Traffic
Total traffic from the AZ to clients (outbound) in the statistical period.
MiB
60, 300, 3600, and 86400
ZoneNetworkTrafficReceive
Inbound Traffic
Total traffic from clients to the AZ (inbound) in the statistical period.
MiB
60, 300, 3600, and 86400
ZoneHttpCodeUpstream2xxRatio
Proportion of 2xx Status Codes Returned by Real Servers
Proportion of 2xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ZoneHttpCodeUpstream3xxRatio
Proportion of 3xx Status Codes Returned by Real Servers
Proportion of 3xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ZoneHttpCodeUpstream4xxRatio
Proportion of 4xx Status Codes Returned by Real Servers
Proportion of 4xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ZoneHttpCodeUpstream5xxRatio
Proportion of 5xx Status Codes Returned by Real Servers
Proportion of 5xx status codes returned by the real server to all backend responses in the statistical period.
%
60, 300, 3600, and 86400
ZoneRequestTime
Average Request Latency
Average latency from when the ALB instance receives a request from clients to when it returns the response to clients in the statistical period.
ms
60, 300, 3600, and 86400

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