Dashboard

Menu path: Status > Dashboard.

Select either Dashboard or System below it to see the summary display of system operation. As a general rule, any graph that is displayed can be further queried by hovering over a location in the graph. A pop-up can appear with further details. When other graphs are displayed with the same time scale, their values are simultaneously highlighted.

Two groups are available at the top of the page:

• System
• RADIUS
• Portal
• Health

This page offers graphs time-based graphs for a number of values. Refer to Graph Interpretation for instructions on interpreting and modifying graphic displays.

The graphics are divided into major sections:

• System
  • CPU usage
  • I/O Wait/Soft IRQ
  • System Load Average
  • Disk I/O
  • Disk space usage for /
  • SYSTEM RAM
  • System Swap Used
• IPv4 Networking
  • IPv4 Bandwidth
  • IPv4 Sockets

Graph Interpretation

Each of the graphs offers common controls legends and controls, shown in the example below.

In addition, you can left select and hold on any graph to move the time window back or forward.

Four RADIUS graphs are displayed. See Graph Interpretation for an explanation of graph contents and controls.

The graphs displayed are:

• RADIUS Latency
  • Auth Rest
  • Acct Rest
• RADIUS requests
  • RADIUS auth
  • RADIUS acct

Several captive web portal related graphs are displayed. See Graph Interpretation for an explanation of graph contents and controls.

The graphs displayed are:

• Captive Portal Responses
  • 1XX RESPONSES
  • 2XX RESPONSES
  • 3XX RESPONSES
  • 4XX RESPONSES
  • 5XX RESPONSES
  • OTHER RESPONSES
• Captive Portal Bandwidth
  • BANDWIDTH USED
• Captive Portal Response Time
  • RESPONSE TIME

Health

The Health tab provides a real-time and historic view of the health of the current A3 instance. The first panel is as shown below.

The drop down at the top right is the period of time over which the system's health is displayed. The available options are:

• Last 1 Hour
• Last 6 Hours
• Last 12 Hours
• Last 1 Day
• Last 2 Days
• Last 1 Week

The first panel displays:

• System Name - the name associated with this A3 instance. A is displayed if the instance is the master in the cluster.
• System Address - the physical IP address of the master, not the virtual address.

The health statistics displayed are:

Statistic	Value
CPU Usage	The instantaneous CPU percentage being used.
RAM	The instantaneous RAM usage.
Disk I/O Backlog [???]	The instantaneous amount of time that a disk I/O request remains in the queue. Larger values equate to slower disk performance.
Cluster Compliance	The number of cluster members that have an up-to-date database. [???]

Except for Cluster Compliance, each statistic offers a graphic display over the time period selected. Select the icon to display the graphs. Three panels are displayed for each statistic. The first two include time and visual control at the bottom right. For example, in the first CPU Usage panel shown below, the controls are . From left to right, these controls are:

• - move the display back in time.
• - resume real-time display.
• - move the display forward in time.
• - increase the graph scale.
• - decrease the graph scale.
• - select and move the control up and down to change the size of the panel.

Moving the cursor across the graph updates the legend on the right-hand side of the panel to the values at that point in time.

• Graph of the statistics values over time. The content of this panel varies per statistic and is discussed below. Selecting any of the statistics in the legend (for example, system in the figure above) causes the graph to display only that statistic. Selecting the statistic again returns the display to its initial form.
• Graph of alarms generated over time. A legend is displayed on the right side of the panel beneath the date and time. In the example below, the green system.c... displays the established CPU alarm for system.cpu.10min_cpu_usage. The full name is displayed by hovering over the short name. The color of the legend item indicates it's current or selected status.
• List of issues detected - a list of issues found over the selected period time. For example, in the figure below a CPU Usage is shown for the start of the instance.

CPU Usage Statistics

The statistics shown for CPU Usage are:

Label	Value
softirq	The percentage of time that the CPU is servicing interrupts.
user	The percentage of time that the CPU is running user code. This includes the A3 application and related processes.
system	The percentage of time that the CPU is running in kernel mode, including device drivers and kernel modules.
nice	The percentage of time that the CPU is running in user mode with lower than normal priority.
iowait	The percentage of time that the CPU is waiting for an I/O operation to complete and can't be used for anything else.

RAM Statistics

The statistics shown for RAM Usage are:

Label	Value
free	The amount of memory not assigned.
used	The amount of memory used by running processes.
cached	The amount of memory used for recently used files.
buffers	The amount of memory reserved by the operating system to allocate as buffers when processes need them.

Disk I/O Backlog

The statistics shown for Disk I/O Backlog are:

Label	Value
backlog	The amount of time that disk I/O had to wait in the disk I/O queue.