Updated on 2026-07-09 GMT+08:00

Monitoring Metrics

Overview

This section describes the namespace, the metrics that can be monitored by Cloud Eye, and dimensions of these metrics. You can view the metrics reported by ELB and the generated alarms on the Cloud Eye console.

Cloud Eye can monitor dimensions nested to a maximum of four levels (levels 0 to 3). Level 3 is the deepest level. For example, if the monitored dimension of a metric is lb_instance_id,lb_listener_id, lb_instance_id indicates level 0 and lb_listener_id indicates level 1.

Namespace

SYS.ELB

Load Balancer Metrics

For shared load balancers, you can view the monitoring metrics by load balancer or listener.

Table 1 Metrics supported by each shared load balancer

Metric ID

Name

Description

Value Range

Unit

Conversion Rule

Monitored Object (Dimension)

Monitoring Interval

(Raw Data)

m1_cps

Concurrent Connections

Load balancing at Layer 4: total number of TCP and UDP connections established between the monitored object and backend servers.

Load balancing at Layer 7: total number of TCP connections established between the clients and the monitored object.

≥ 0

Count

N/A

lb_instance_id

1 minute

m2_act_conn

Active Connections

The number of active TCP and UDP connections established between the monitored object and backend servers.

You can run the following command to view the connections (both Windows and Linux servers):

netstat -an

≥ 0

Count

N/A

lb_instance_id

1 minute

m3_inact_conn

Inactive Connections

The number of inactive TCP and UDP connections established between the monitored object and backend servers.

You can run the following command to view the connections (both Windows and Linux servers):

netstat -an

≥ 0

Count

N/A

lb_instance_id

1 minute

m4_ncps

New Connections

The number of new connections established between clients and the monitored object per second.

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m5_in_pps

Incoming Packets

The number of packets received by the monitored object per second.

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m6_out_pps

Outgoing Packets

The number of packets sent from the monitored object per second.

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m7_in_Bps

Inbound Traffic Rate

How fast the inbound traffic reaches the monitored object.

≥ 0

Byte/s

1000 (SI)

lb_instance_id

1 minute

m8_out_Bps

Outbound Traffic Rate

How fast the outbound traffic leaves the monitored object.

≥ 0

Byte/s

1000 (SI)

lb_instance_id

1 minute

m9_abnormal_servers

Unhealthy Servers

The number of unhealthy backend servers associated with the monitored object.

≥ 0

Count

N/A

lb_instance_id

1 minute

ma_normal_servers

Healthy Servers

The number of healthy backend servers associated with the monitored object.

≥ 0

Count

N/A

lb_instance_id

1 minute

m22_in_bandwidth

Inbound Bandwidth

The bandwidth used for accessing the monitored object from external networks.

≥ 0

bit/s

1000 (SI)

lb_instance_id

1 minute

m23_out_bandwidth

Outbound Bandwidth

The bandwidth used by the monitored object to access external networks.

≥ 0

bit/s

1000 (SI)

lb_instance_id

1 minute

m1e_server_rps

Reset Packets from Backend Servers

The number of reset packets sent by backend servers to clients per second. These reset packets are generated by the backend servers and then forwarded by the load balancer.

Supported protocols: TCP

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m21_client_rps

Reset Packets from Clients

The number of reset packets sent by clients to backend servers per second. These reset packets are generated by clients and then forwarded by the load balancer.

Supported protocols: TCP

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m1f_lvs_rps

Reset Packets from Load Balancer

The number of reset packets generated by the load balancer per second.

Supported protocols: TCP

≥ 0

Count/s

N/A

lb_instance_id

1 minute

mb_l7_qps

Layer 7 Query Rate

The number of queries the monitored object receives per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

mc_l7_http_2xx

2xx Status Codes (Total)

The number of 2xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

md_l7_http_3xx

3xx Status Codes (Total)

The number of 3xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

me_l7_http_4xx

4xx Status Codes (Total)

The number of 4xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

mf_l7_http_5xx

5xx Status Codes (Total)

The number of 5xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m10_l7_http_other_status

Other Status Codes (Total)

The number of other status codes returned by the monitored object and backend servers per second at Layer 7.

Excluded status codes: 2xx, 3xx, 404 Not Found, 499 Client Closed Request, and 502 Bad Gateway

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m11_l7_http_404

404 Not Found (Total)

The number of 404 Not Found status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m12_l7_http_499

499 Client Closed Request (Total)

The number of 499 Client Closed Request status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m13_l7_http_502

502 Bad Gateway (Total)

The number of 502 Bad Gateway status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m14_l7_rt

Average Layer 7 Response Time

Average response time of the monitored object at Layer 7.

The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients.

Supported protocols: HTTP/HTTPS

NOTE:

The average response time it takes to establish a WebSocket connection may be very long. This metric cannot be used as a reference.

≥ 0

ms

1000 (SI)

lb_instance_id

1 minute

m15_l7_upstream_4xx

4xx Status Codes (Backend Servers)

The number of 4xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m16_l7_upstream_5xx

5xx Status Codes (Backend Servers)

The number of 5xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m18_l7_upstream_2xx

2xx Status Codes (Backend Servers)

The number of 2xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m19_l7_upstream_3xx

3xx Status Codes (Backend Servers)

The number of 3xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id

1 minute

m17_l7_upstream_rt

Average Server Response Time

Average response time of backend servers associated with the monitored object at Layer 7.

The response time starts when the monitored object routes the requests to the backend server and ends when the monitored object receives a response from the backend server.

Supported protocols: HTTP/HTTPS

NOTE:

The average response time it takes to establish a WebSocket connection may be very long. This metric cannot be used as a reference.

≥ 0

ms

1000 (SI)

lb_instance_id

1 minute

m1a_l7_upstream_rt_max

Maximum Server Response Time

Maximum response time of the backend server associated with the monitored object at Layer 7.

The response time starts when the monitored object routes the requests to the backend server and ends when the monitored object receives a response from the backend server.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id

1 minute

m1b_l7_upstream_rt_min

Minimum Server Response Time

Minimum response time of the backend server associated with the monitored object at Layer 7.

The response time starts when the monitored object routes the requests to the backend server and ends when the monitored object receives a response from the backend server.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id

1 minute

m1c_l7_rt_max

Maximum Layer 7 Response Time

Maximum response time of the monitored object at Layer 7.

The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id

1 minute

m1d_l7_rt_min

Minimum Layer 7 Response Time

Minimum response time of the monitored object at Layer 7.

The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id

1 minute

m25_l7_resp_Bps

Layer 7 Response Bandwidth

The bandwidth used by the backend servers associated with the monitored object to return responses to clients.

NOTE:

When HTTP/2 is enabled for a listener, this metric cannot be used as a reference.

≥ 0

bit/s

1000 (SI)

lb_instance_id

1 minute

m24_l7_req_Bps

Layer 7 Request Bandwidth

The bandwidth used by the backend servers associated with the monitored object to receive requests from clients.

NOTE:

When HTTP/2 is enabled for a listener, this metric cannot be used as a reference.

≥ 0

bit/s

1000 (SI)

lb_instance_id

1 minute

Listener Metrics

Table 2 Metrics supported by each listener

Metric ID

Name

Description

Value Range

Unit

Conversion Rule

Monitored Object (Dimension)

Monitoring Interval

(Raw Data)

m1_cps

Concurrent Connections

Load balancing at Layer 4: total number of TCP and UDP connections established between the monitored object and backend servers.

Load balancing at Layer 7: total number of TCP connections established between the clients and the monitored object.

Unit: Count

≥ 0

Count

N/A

lb_instance_id,lb_listener_id

1 minute

m2_act_conn

Active Connections

The number of active TCP and UDP connections established between the monitored object and backend servers.

You can run the following command to view the connections (both Windows and Linux servers):

netstat -an

Unit: Count

≥ 0

Count

N/A

lb_instance_id,lb_listener_id

1 minute

m3_inact_conn

Inactive Connections

The number of inactive TCP and UDP connections established between the monitored object and backend servers.

You can run the following command to view the connections (both Windows and Linux servers):

netstat -an

Unit: Count

≥ 0

Count

N/A

lb_instance_id,lb_listener_id

1 minute

m4_ncps

New Connections

The number of new connections established between clients and the monitored object per second.

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m5_in_pps

Incoming Packets

The number of packets received by the monitored object per second.

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m6_out_pps

Outgoing Packets

The number of packets sent from the monitored object per second.

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m7_in_Bps

Inbound Traffic Rate

How fast the inbound traffic reaches the monitored object.

≥ 0

Byte/s

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m8_out_Bps

Outbound Traffic Rate

How fast the outbound traffic leaves the monitored object.

≥ 0

Byte/s

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m22_in_bandwidth

Inbound Bandwidth

The bandwidth used for accessing the monitored object from external networks.

≥ 0

bit/s

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m23_out_bandwidth

Outbound Bandwidth

The bandwidth used by the monitored object to access external networks.

≥ 0

bit/s

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m1e_server_rps

Reset Packets from Backend Servers

The number of reset packets sent by backend servers to clients per second. These reset packets are generated by the backend servers and then forwarded by the load balancer.

Supported protocols: TCP

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m21_client_rps

Reset Packets from Clients

The number of reset packets sent by clients to backend servers per second. These reset packets are generated by clients and then forwarded by the load balancer.

Supported protocols: TCP

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m1f_lvs_rps

Reset Packets from Load Balancer

The number of reset packets generated by the load balancer per second.

Supported protocols: TCP

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

mb_l7_qps

Layer 7 Query Rate

The number of queries the monitored object receives per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

mc_l7_http_2xx

2xx Status Codes (Total)

The number of 2xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

md_l7_http_3xx

3xx Status Codes (Total)

The number of 3xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

me_l7_http_4xx

4xx Status Codes (Total)

The number of 4xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

mf_l7_http_5xx

5xx Status Codes (Total)

The number of 5xx status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m10_l7_http_other_status

Other Status Codes (Total)

The number of other status codes returned by the monitored object and backend servers per second at Layer 7.

Excluded status codes: 2xx, 3xx, 404 Not Found, 499 Client Closed Request, and 502 Bad Gateway

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m11_l7_http_404

404 Not Found (Total)

The number of 404 Not Found status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m12_l7_http_499

499 Client Closed Request (Total)

The number of 499 Client Closed Request status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m13_l7_http_502

502 Bad Gateway (Total)

The number of 502 Bad Gateway status codes returned by the monitored object and backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m14_l7_rt

Average Layer 7 Response Time

Average response time of the monitored object at Layer 7.

The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients.

Supported protocols: HTTP/HTTPS

NOTE:

The average response time it takes to establish a WebSocket connection may be very long. This metric cannot be used as a reference.

≥ 0

ms

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m15_l7_upstream_4xx

4xx Status Codes (Backend Servers)

The number of 4xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m16_l7_upstream_5xx

5xx Status Codes (Backend Servers)

The number of 5xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m18_l7_upstream_2xx

2xx Status Codes (Backend Servers)

The number of 2xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m19_l7_upstream_3xx

3xx Status Codes (Backend Servers)

The number of 3xx status codes returned by the backend servers per second at Layer 7.

Supported protocols: HTTP/HTTPS

≥ 0

Count/s

N/A

lb_instance_id,lb_listener_id

1 minute

m17_l7_upstream_rt

Average Server Response Time

Average response time of backend servers associated with the monitored object at Layer 7.

The response time starts when the monitored object routes the requests to the backend server and ends when the monitored object receives a response from the backend server.

Supported protocols: HTTP/HTTPS

NOTE:

The average response time it takes to establish a WebSocket connection may be very long. This metric cannot be used as a reference.

≥ 0

ms

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m1a_l7_upstream_rt_max

Maximum Server Response Time

Maximum response time of the backend server associated with the monitored object at Layer 7.

The response time starts when the monitored object routes the requests to the backend server and ends when the monitored object receives a response from the backend server.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m1b_l7_upstream_rt_min

Minimum Server Response Time

Minimum response time of the backend server associated with the monitored object at Layer 7.

The response time starts when the monitored object routes the requests to the backend server and ends when the monitored object receives a response from the backend server.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m1c_l7_rt_max

Maximum Layer 7 Response Time

Maximum response time of the monitored object at Layer 7.

The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m1d_l7_rt_min

Minimum Layer 7 Response Time

Minimum response time of the monitored object at Layer 7.

The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients.

Supported protocols: HTTP/HTTPS

≥ 0

ms

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m25_l7_resp_Bps

Layer 7 Response Bandwidth

The bandwidth used by the backend servers associated with the monitored object to return responses to clients.

NOTE:

When HTTP/2 is enabled for a listener, this metric cannot be used as a reference.

≥ 0

bit/s

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

m24_l7_req_Bps

Layer 7 Request Bandwidth

The bandwidth used by the backend servers associated with the monitored object to receive requests from clients.

NOTE:

When HTTP/2 is enabled for a listener, this metric cannot be used as a reference.

≥ 0

bit/s

1000 (SI)

lb_instance_id,lb_listener_id

1 minute

If a metric has multiple levels of monitoring dimensions, you need to specify each dimension level when you use an API to query this metric.

Suppose you want to query the number of new connections (m4_ncps). The dimension of the metric is lb_instance_id,lb_listener_id. lb_instance_id indicates level 0 and lb_listener_id indicates level 1.

  • To query this metric by calling an API, specify the m4_ncps dimension as follows:
    dim.0=lb_instance_id,530cd6b0-86d7-4818-837f-935f6a27414d&dim.1=lb_listener_id,3773b058-5b4f-4366-9035-9bbd9964714a

    530cd6b0-86d7-4818-837f-935f6a27414d and 3773b058-5b4f-4366-9035-9bbd9964714a are the dimension values of lb_instance_id and lb_listener_id, respectively. For details about how to obtain the values, see Dimensions.

  • To query multiple metrics by calling an API, specify the m4_ncps dimension as follows:
    "dimensions": [
    {
    "name": "lb_instance_id",
    "value": "530cd6b0-86d7-4818-837f-935f6a27414d"
    }
    {
    "name": "lb_listener_id",
    "value": "3773b058-5b4f-4366-9035-9bbd9964714a"
    }
    ]

    530cd6b0-86d7-4818-837f-935f6a27414d and 3773b058-5b4f-4366-9035-9bbd9964714a are the dimension values of lb_instance_id and lb_listener_id, respectively. For details about how to obtain the values, see Dimensions.

Dimensions

Key

Value

lb_instance_id

ID of a shared load balancer

You can obtain the value by calling the API for .

lb_listener_id

ID of a listener added to a shared load balancer

You can obtain the value by calling the API for .