You can use Cloud Monitor to view the monitoring data of a Server Load Balancer (SLB) instance, such as the number of connections, number of packets, and traffic.
- Log on to the SLB console.
- On the Instances page, select the region in which the SLB instance that you want to view resides.
- Find the SLB instance and click the monitoring icon .
- Select the monitoring metrics that you want to view.
The following table lists the monitoring metrics of SLB instances.
Monitoring metric Description Traffic
- Inbound Traffic: the amount of traffic consumed to access an SLB instance.
- Outbound Traffic: the amount of traffic consumed by an SLB instance to access the Internet.
- Inbound Packets: the number of request packets received per second.
- Outbound Packets: the number of response packets sent per second.
- Active Connections Count: the number of TCP connections that are in the ESTABLISHED state. If persistent connections are used, a connection may transfer multiple file requests simultaneously.
- Inactive Connections Count: the number of TCP connections that are not in the ESTABLISHED state. You can run the
netstat -ancommand to view the connections for both Windows and Linux instances.
- Maximum Concurrent Connections Count: the total number of TCP connections.
New Connections The average number of new TCP connections established between clients and SLB instances in a statistical period. Dropped Traffic
- Dropped Inbound Traffic: the amount of inbound traffic dropped per second.
- Dropped Outbound Traffic: the amount of outbound traffic dropped per second.
- Dropped Inbound Packets: the number of inbound packets dropped per second.
- Dropped Outbound Packets: the number of outbound packets dropped per second.
Dropped Connections The number of connections dropped per second. Metrics specific to Layer 7 (HTTP or HTTPS) listeners Layer-7 QPS The number of HTTP or HTTPS requests that can be processed per second. Response Time (Listener) The average response time of an SLB instance. HTTP Status Code 2XX/3XX/4XX/5XX/Other HTTP Status Codes (Listener) The number of HTTP response codes returned by listeners. HTTP Status Code 4XX/5XX (Server) The number of HTTP response codes returned by backend servers. Response Time (Server) The average response time of backend servers.