These graphs display the connections, bytes, bits or packets, depending on choice. The buttons in the top right of the page toggle which values are displayed. The values displayed for the Real Server comprise of the values for all the Virtual Services accessing the Real Server.

If the Real Server has been assigned to more than one Virtual Service, you can view the statistics for each Real Server by Virtual Service by clicking the arrow ( ) to the right of the number in the first column. This expands the view to show the statistics for each Virtual Service on the Real Server.

Note: Because of the way that encrypted services are implemented, it is not possible to view the packet statistics on an encrypted Virtual Service.

Name: The Name column is automatically populated based on a DNS lookup.

IP Address: This column displays the IP address of the Real Servers.

Clicking the links in the IP Address column will display another screen containing a number of statistics specific to that Real Server.

Round trip times between the LoadMaster and Real Server are displayed. The performance of the Real Servers is monitored with the following two measurements:

  • How long the Real Server takes to respond to the request (first byte).
  • How long the Real Server takes to send all the data (last byte) - response time.

In the above graphic the Request/Response Current Max figures are 2 / 3329. This means that it took the Real Server a maximum of 2ms to respond to the request (first byte) and a max of 3329ms to send all the data and this is the measurement of the response time.

Note: Round Trip Time (RTT) to the server cannot be measured if using re-encrypt.
Note: Request/Response times are not applicable if the service being used is not a HTTP-HTTP/2-HTTPS service.
Note: Clicking Reset Statistics in the Debug Options screen (System Configuration > System Administration > System Log Files > Debug Options) clears all the values.

For each RTT or request/response time, the following values are measured:

  • Current Average: The average time (in milliseconds (ms)) over the last 5 seconds (or since the last statistics reset).
  • Current Max: The current maximum time (in ms) - in the last 5 seconds (or since the last statistics reset).
  • Current Min: The current minimum time (in ms) - in the last 5 seconds (or since the last statistics reset).
  • Long Term Avg: The average time over the whole period since the Virtual Service started handling traffic (or since the last statistics reset).
  • Long Term Max: The all-time maximum value (in ms) since the Virtual Service started handling traffic (or since the last statistics reset).
  • Long Term Min: The all-time minimum value (in ms) (or since the last statistics reset).

Values are only present if values have been recorded. For example, no Current Max displays if no traffic has passed through the Virtual Service in the last five seconds or if the Virtual Service cannot monitor the specific values.

Note: The Current Average, Current Max, Current Min, Long Term Avg, Long Term Max, and Long Term Min for Virtual Services and Real Servers are also available over SNMP.

Status: This shows the status of the Real Server.

Adaptive: This will only be displayed if an adaptive scheduling method has been selected for a Virtual Service. This column will display the adaptive value.

Weight: This will only be displayed if the scheduling method is set to resource based (SDN adaptive) in a Virtual Service. The information which is gathered from the controller determines what the Adaptive value is set to. As the adaptive value goes up, the weight of the Real Server goes down. If all adaptive values are the same, all weights are the same. When the adaptive values are different the weights will change. The weight of the Real Servers determines where traffic is sent. If a Real Server is configured in multiple Virtual Services, two numbers are displayed for the weight - the first shows the average of the current weights over all Virtual Services that the Real Server is configured in. The second shows the number of Virtual Services that the Real Server is configured in. For example, a Weight of 972/2 means that the average weight of a Real Server which is configured in two Virtual Services is 972.

Total Conns: The total number of connections made.

Note: For Layer 4 UDP connections - the connection count always shows as 0.

Last 60 Sec: The total number of connections in the last 60 seconds.

5 Mins: The total number of connections in the last 5 minutes.

30 Mins: The total number of connections in the last 30 minutes.

1 Hour: The total number of connections in the last hour.

Active Conns: The total number of connections that are currently active.

Note: When using ESP, all connections going through the login process are counted as active connections for the Virtual Service. They are not counted as active connections for the Real Server because they are not actual connections to the Real Server. The WUI page displays the number of active connections associated with the Real Servers, while SNMP displays the number of active connections for the Virtual Service. The API returns the same value as displayed in the WUI. Without ESP, these values are identical. When using ESP, the Virtual Service counts can be much higher than the final counts going to the Real Servers, due to the above reason.

Current Rate Conns/sec: The current rate of connections per second.

[%]: The percentage of connections per second.

Conns/sec: A graphical representations of the connections per second.

System Total Conns: This row displays totals for each of the columns.