This topic describes how to view the monitoring data of a Server Load Balancer (SLB) instance.

Procedure

  1. Log on to the SLB console.
  2. Select the region of the target SLB instance.
  3. Click the monitoring icon next to the target SLB instance.
  4. Select the monitoring metrics that you want to view.


    The following metrics are monitored for SLB instances.
    Metric Description
    Traffic
    • Inbound Traffic: the traffic sent from an external network to SLB
    • Outbound Traffic: the traffic sent from SLB
    Packets
    • RX Packets Count: the number of request packets received per second
    • TX Packets Count: the number of response packets sent per second
    Concurrent Connections
    • Active Connections Count: the number of established TCP connections. If persistent connections are used, a connection can transfer multiple file requests at one time.
    • Inactive Connections Count: the number of TCP connections not in the established state. You can use the netstat -an command to view the connections for both Windows and Linux servers.
    • Max Concurrent Connections Count: the total number of TCP connections.
    Average Connection Requests Count The average number of new TCP connections established between clients and SLB 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 Packets
    • Dropped RX Packets: the number of inbound packets dropped per second
    • Dropped TX Packets: the number of outbound packets dropped per second
    Dropped Connections Count The number of TCP connections dropped per second
    The following metrics are specific to Layer-7 listeners.
    Layer-7 Protocol QPS The number of HTTP/HTTPS requests that can be handled per second
    Response Time (Listener) The average response time of SLB
    HTTP Status Code 2xx/3xx/4xx/5xx/Others (Listener) The average number of HTTP response codes generated by listeners
    Response Code 4xx/5xx (Server) The average number of HTTP response codes generated by backend servers
    Response Time (Server) The average response time of backend servers