ELB Metrics

**Table 1** Metrics supported by ELB
Metric ID	Name	Description	Value	Monitored Object	Monitoring Period (Raw Data)
m1_cps	Concurrent Connections	Load balancing at Layer 4: total number of TCP and UDP connections from the monitored object to backend servers Load balancing at Layer 7: total number of TCP connections from the clients to the monitored object Unit: N/A	≥ 0	Load balancer Listener	1 minute
m2_act_conn	Active Connections	Number of TCP and UDP connections in the ESTABLISHED state 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: N/A	≥ 0
m3_inact_conn	Inactive Connections	Number of TCP connections between the monitored object and backend servers except those in the ESTABLISHED state You can run the following command to view the connections (both Windows and Linux servers): netstat -an Unit: N/A	≥ 0
m4_ncps	New Connections	Number of connections established between clients and the monitored object per second Unit: Count/s	≥ 0/second
m5_in_pps	Incoming Packets	Number of packets received by the monitored object per second Unit: Packet/s	≥ 0/second
m6_out_pps	Outgoing Packets	Number of packets sent from the monitored object per second Unit: Packet/s	≥ 0/second
m7_in_Bps	Inbound Rate	Traffic used for accessing the monitored object from the Internet per second Unit: byte/s	≥ 0 bytes/s
m8_out_Bps	Outbound Rate	Traffic used by the monitored object to access the Internet per second Unit: byte/s	≥ 0 bytes/s
m9_abnormal_servers	Unhealthy Servers	Number of unhealthy backend servers associated with the monitored object Unit: N/A	≥ 0	Load balancer	1 minute
ma_normal_servers	Healthy Servers	Number of healthy backend servers associated with the monitored object Unit: N/A	≥ 0	Load balancer	1 minute
mb_l7_qps	Layer-7 Query Rate	Number of requests the monitored object receives per second Unit: Query/s	≥ 0 query/s	Load balancer Listener	1 minute
md_l7_http_3xx	Layer-7 3xx Status Codes	Number of 3xx status codes returned by the monitored object Unit: Count/s	≥ 0/second	Load balancer Listener	1 minute
mc_l7_http_2xx	Layer-7 2xx Status Codes	Number of 2xx status codes returned by the monitored object Unit: Count/s	≥ 0/second	Load balancer Listener	1 minute
me_l7_http_4xx	Layer-7 4xx Status Codes	Number of 4xx status codes returned by the monitored object Unit: Count/s	≥ 0/second
mf_l7_http_5xx	Layer-7 5xx Status Codes	Number of 5xx status codes returned by the monitored object Unit: Count/s	≥ 0/second
m10_l7_http_other_status	Layer-7 Other Status Codes	Number of status codes returned by the monitored object except 2xx, 3xx, 4xx, and 5xx status codes Unit: Count/s	≥ 0/second
m11_l7_http_404	Layer-7 404 Not Found	Number of 404 Not Found status codes returned by the monitored object Unit: Count/s	≥ 0/second
m12_l7_http_499	Layer-7 499 Client Closed Request	Number of 499 Client Closed Request status codes returned by the monitored object Unit: Count/s	≥ 0/second
m13_l7_http_502	Layer-7 502 Bad Gateway	Number of 502 Bad Gateway status codes returned by the monitored object Unit: Count/s	≥ 0/second
m14_l7_rt	Average Layer-7 Response Time	Average response time of the monitored object The response time starts when the monitored object receives requests from the clients and ends when it returns all responses to the clients. Unit: ms NOTE: The average response time it takes to establish a WebSocket connection may be very high. This metric cannot be used as a reference.	≥ 0 ms