<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: Review Monitoring Data

Probe, group, device, and sensor pages have tabs that you can use to navigate between different options. For example, you can view your network's status, view monitoring results, or change settings.

Tabs Bar for Sensors

Tabs Bar for Sensors

Overview

The Overview tab shows an overview of the currently selected object and its sensors. The pages share a common structure, but some elements differ depending on the type of object.

  • Probes and Groups: The tab shows a tree-like view with devices and sensors, a geographical map, as well as summary graphs for different time spans of the probe or group.
  • Devices: The tab shows device details, a geographical map, and summary graphs for different time spans, gauges, as well as a table list of all sensors on this device, and a table list with recommended sensors.
  • Sensors: The tab shows sensor details, current status, gauges, sensor graphs for different time spans, a table with all channels, as well as similar sensors, which show correlations in your network.

icon-i-round-blueYou can turn off the sensor recommendation and disable the table list in System Administration—Monitoring.

icon-i-round-blueAssign 4-star (****) or 5-star (*****) priorities to sensors to display their gauges on your devices' Overview tabs. 5-star sensors are represented by larger gauges (upper row in the screenshot) rather than 4-star sensors (lower row in the screenshot).

Gauges are the visual representation of channel values that you can use as a quick status indicator.

  • Red and yellow sections of gauges correspond to the error and warning limits of the channel settings.
  • Device Overview tabs only show gauges of high-priority sensors with 4 stars (****) or more.
  • Sensor Overview tabs show gauges of all channels (except the Downtime channel), regardless of priority. The primary channel is displayed with the large gauge.
  • Channels that display binary values such as on/off or successful/failing because of their lookup configuration are visualized as switches not gauges. Switches only show red or green for their respective two states.
  • The x-bar symbol (x-bar_symbol) in gauges shows the mean of the returned values.

icon-i-round-blueFor the gauge to remain legible, we recommend that you stay below 120 lookup values for primary channels of sensors with a 5-star priority. For sensors with a priority of 4 stars, the recommended limit is about 40 lookup values.

Device Overview Tab with Gauges for High Priority Sensors, Sensors Table List, Geo Map, and Mini Graphs

Device Overview Tab with Gauges for High Priority Sensors, Sensors Table List, Geo Map, and Mini Graphs

Toplists

Toplists are available for xFlow and Packet Sniffer sensors only. Toplist graphs are displayed directly on the sensor's Overview tab.

icon-square-cyanFor more information, see section Toplists.

Live Data and Data By x Days

Select one of the tabs Live Data (available for sensors only), 2 days, 30 days, or 365 days to display an object's monitoring data live (sensors only), or to display data for different time spans and in more or less detail. The time that graph legends and data tables show depends on the time zone settings for the currently logged in user.

icon-i-round-blueThe days mentioned here are the default settings. You can change the shown days of the different graphs under System Administration—User Interface.

icon-i-round-blueGraphs label minimum and maximum values of a sensor's primary channel and minimum and maximum values of the Response Time Index of other objects. A maximum value of 100% is not labeled.

2 Days Tab of a Device with Overview Graph and Sensor Mini Graphs

2 Days Tab of a Device with Overview Graph and Sensor Mini Graphs

Live Data and Data By x Days—Probes, Groups, and Devices

For probes, groups, and devices, each of the tabs shows a summary graph for the current object and mini graphs for all sensors on this object, as well as a data table for the current object. For performance reasons, PRTG never displays more than 50 mini graphs. Hover over a mini graph to display the graph legend.

Summary graphs show the number of alarms as well as three index graphs. These graphs indicate response time, CPU load, and bandwidth usage for all sensors. Index graphs are similar to a stock index. The shown values are based on the readings of all sensors of this object. PRTG computes these values using statistics and by comparing the values to the highest and lowest readings ever recorded.

The three index graphs show overall (or global) trends in your network. If these values increase over a certain time span, then CPU load, bandwidth usage, or response time have worsened during this time. For example, a CPU Load Index value of 90% means that the average CPU load for all CPU sensors of your current configuration is at 90% of the highest ever measured CPU load value.

The following channels are available in the summary graph:

  • Alarms: Sums up the number of all Down states of sensors on this object during the specified time span. This graph provides you with a bird's eye view of your network issues. It cannot be hidden.
  • Response Time Index: Indicates the request times in your network.
  • CPU Load Index: Indicates the CPU load in your network.
  • Traffic Index: Indicates the bandwidth usage in your network.

icon-square-cyanFor more details about the index graphs, see the Knowledge Base: How does PRTG compute CPU Index, Traffic Index and Response Time Index?

You can hide all channels individually except the "Alarms" channel. To do this, remove the check mark symbol in front of a channel name below the graph, and the corresponding channel's line disappears. You can also Show all or Hide all channels by clicking the buttons in the lower-right corner. The graph view is reset immediately.

Sensor Live Data Tab for an SNMP Traffic Sensor

Sensor Live Data Tab for an SNMP Traffic Sensor

Live Data and Data By x Days—Sensors

For sensors, each tab shows a graph and data table for the selected sensor. When viewing the data of a sensor that runs on a cluster probe, you can additionally select if you want to show the data of all cluster nodes, or of one specific cluster node only. Use the Show data of option above the graph.

icon-i-round-blueGraphs for multiple cluster nodes are never displayed as filled graphs, they are displayed with lines only. However, historic data reports can have filled graphs for multiple cluster nodes.

While viewing a sensor graph, you can hide single channels individually. Just remove the check mark symbol in front of a channel name below the graph, and the according channel's line disappears. You can also Show all or Hide all channels by clicking the buttons in the lower-right corner.

Live Data and Data By x Days—Interactive Graphs

The graphs shown on a sensor's historic data tabs, as well as zoomed graphs in new windows (see below) that belong to other monitoring objects are all interactive. You can zoom in and scroll along the time axis with the corresponding buttons.

Graph Buttons

Graph Buttons

The following actions are available for graphs:

  • button_scroll_left scrolls one graph window left and button_scroll_right one graph window right. The scrolled time depends on the graph that you select, for example, 2 days on a 2 days graph.
  • button_scroll_left_one scrolls left and button_scroll_right_one right on the time axis. The scrolled time depends on the graph that you select.
  • button_zoom_in zooms into and button_zoom_out out of the graph. The displayed time depends on the graph selected. For example, you can zoom into a 30 days graph so that it shows data for 6 days.
  • button_reset resets the graph to the default view.

In the upper-right corner of each graph, three small icons are located graph_externalwindow.

  • download_the_graph Download the graph (PNG or SVG): Shows a .png or .svg file of the graph in a new browser window. You can then save or copy it for later use.
  • zoom_graph_in_new_window Zoom graph in new window: Opens a larger version of the graph in a new browser window.

For each graph, you can also choose which specific channels (only for sensors) or indexes that you want to see via the corresponding check boxes or the Show all and Hide all buttons.

icon-i-round-blueWarning or error limits are only shown in graphs (highlighted in yellow or red) if you select exactly one channel with a limit.

Historic Data

The Historic Data tab is available for sensors only.

icon-square-cyanFor more information, section Historic Data Reports.

Sensor Lists

Viewing lists of sensors helps you keep an eye on your network status because you can select which kind of sensors you would like to see. Many different sensor list views are available, such as a list of favorite sensors and top 10 lists, lists filtered by current sensor status, value, availability, tag or type, sensor cross reference, and many more.

You can access sensor lists via the main menu bar. Click the Sensors entry to show a table list of all sensors. In the table list displayed here, you can re-arrange the items by clicking the column's header items (see section Working with Table Lists). Hover over it to show other menu options.

icon-square-cyanFor detailed information about the available options, see section Main Menu Structure (Sensors).

Alarms

The Alarms tab is not available for sensors, but for probes, groups, and devices only.

icon-square-cyanFor more information, see section Alarms.

System Information

The System Information tab is available for devices only.

icon-square-cyanFor more information, see section System Information.

Log

The Logs tab shows past activities and events regarding the currently selected object.

icon-square-cyanFor more information, see section Logs.

More

icon-square-bluePRTG MANUAL

 

icon-square-blueKNOWLEDGE BASE

How does PRTG compute CPU Index, Traffic Index and Response Time Index?

Why do I get a warning message when time zones differ?

Ajax Web Interface—Basic Procedures—Topics

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