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 percentage of distribution across the Virtual Service's Real Servers are displayed.

Name: The name of the Virtual Service.

Virtual IP Address: The IP address and port of the Virtual Service.

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

Round trip times between the client and LoadMaster are displayed. The performance of the Virtual Service is monitored with the following two measurements:

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

In the above graphic the Request/Response Current Max figures are 1026 / 5484. This means that it took the Real Server a maximum of 1026ms to respond to the request (first byte) and a max of 5484ms to send all the data and this is the measurement of the response time.

The following limiting statistics are also available in the Virtual Service statistics:

  • Conns/Sec Blocked

  • Req/Sec Blocked

  • MaxConns Blocked

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.

Address: The IP address of the Virtual Service.

Protocol: The protocol of the Virtual Service. This will either be tcp or udp.

Active Conns: The total number of connections that are currently active. Here are some notes about how the active connections are calculated:

  • The value reported in the WUI and API is an average calculated over five seconds.

  • Because the number is an average and not a scalar data point, it does not represent "now" (the number of active connections at a specific point in time).

  • Because of the sampling/average method used to report this statistic, the actual number of active connections can be severely under-counted if the incoming traffic stream contains a lot of short-lived connections.

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.

Total Conns: The total number of connections made.

Total Bytes: The total number of bytes transmitted.

Real Servers: The total number of Real Servers in this Virtual Service.

Persist Entries: The total number of persistence entries made.

WAF: The status, along with the other WAF statistics below, are displayed if WAF is enabled on the Virtual Service.

Requests: The total number of requests handled by the WAF (shows all requests, whether they were blocked or not). Two requests are recorded for each connection – one incoming and one outgoing request.

Incidents: The total number of events handled by the WAF (that is, requests that were blocked).

Incidents/Hour: The number of events that have happened in the current hour (since xx.00.00).

Incidents/Day: The number of events that have happened since midnight (local time).

Incidents/Dayover: The number of times the event counter has gone over the configured warning threshold today. For example, if the threshold is set to 10 and there has been 20 events, this counter is set to 2. The warning threshold is set on a per-Virtual Service basis by filling out the Hourly Alert Notification Threshold field in WAF Options in the Virtual Service modify screen. For further information, refer to the Web Application Firewall (WAF) Options section.

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