The Historical Graphs screen provides a graphical representation of the LoadMaster statistics. These configurable graphs provide a visual indication of the traffic that is being processed by the LoadMaster.

Note: In some cases, after upgrading the LoadMaster firmware from version 7.1.35 to a newer firmware version, historical graphs may not display. To fix this, reset the statistic counters (System Configuration > Extended Log Files > System Log Files > Debug Options > Reset Statistics).

There are graphs for the network activity on each interface. There is also an option to view graphs for the overall and individual Virtual Services and the overall and individual Real Servers.

The time granularity can be specified by selecting one of the hour, day, month, quarter or year options.

In the case of the network activity on the interface graphs, you can choose which type of measurement unit you wish to use by selecting one of the Packet, Bits or Bytes options.

For the Virtual Services and Real Servers graphs you can choose which type of measurement unit you wish to use by selecting one of the Connections, Bits or Bytes options.

You can configure which Virtual Service statistics are being displayed by clicking the configuration icon: in the Virtual Services panel. This opens the Virtual Services configuration window.

From here, Virtual Services can be added or removed from the statistics display.

You can disable these graphs by disabling the Enable Historical Graphs check box in the WUI Settings screen.

A maximum of five Virtual Services can be displayed at the same time.

To close the dialog and apply any changes, please ensure to click the button within the window itself.

You can configure which Real Server statistics are being displayed by clicking the configuration icon, in the Real Servers panel. This opens the Real Servers configuration dialog in a separate window.

From here, Real Servers can be added or removed from the statistics display.

A maximum of five Real Servers can be displayed at the same time.

To close the dialog and apply any changes, please ensure you click the button within the window itself.

By default, only the statistics for the Virtual Services and Real Servers displayed on the Statistics page are gathered and stored. To view statistics for all Virtual Services and Real Servers, enable the Collect All Statistics option in System Configuration > Miscellaneous Options > WUI Settings.

Note: This option is disabled by default because collecting statistics for a large number of Virtual Services and Real Servers can cause CPU utilization to become very high.

The graphs in the LoadMaster WUI are auto-scaling and are shown using SI magnitude units. The graph will show the prefix of the scaling factor used so the absolute value can be calculated if needed.

The possible scaling factors and their prefixes are listed in the table below.

Symbol

Prefix

Factor

P

peta

10^15

T

tera

10^12

G

giga

10^9

M

mega

10^6

k

kilo

10^3

m

milli

10^(-3)

µ

micro

10^(-6)

To calculate the absolute “real” value, take the value shown in the graph and multiply it by the scaling value.

Example

A value of 200 is shown in the connections per second graph with a scaling factor of “m”. As listed in the table above, “m” stands for “milli”. Therefore, to find the absolute value of connections per second for that time – the value of 200 needs to be multiplied by a factor of 10^(-3):

  • 10^(-3) = 0.001
  • 200 x 0.001 = 0.2 connections per second

This calculation shows that there is less than one connection per second and, due to the fact that the connection rate is so low, if the graph shows the absolute number of connections it will just be a straight line at zero and offers no useful information.