PRTG Manual: Historic Data Reports

For quick reviews of a sensor's monitoring data, use historic data reports as an alternative to the comprehensive reports function. You can run and view a report of historic data for each single sensor on demand. Additionally, you can export this sensor data as .xml or .csv files to your computer to further process it with third-party applications.

There are two ways to open historic data reports: Either click the Historic Data tab of a sensor or select Sensors | View Historic Data from the main menu.

Historic Data (Sensor Tab)

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

The Historic Data tab is available for sensors only (not for probes, groups, or devices). When you open the historic data tab of a sensor, no sensor selection is available. If you want to select a different sensor for the report, select Sensors | View Historic Data from the main menu in the PRTG web interface.

Historic Data Tab of a Ping Sensor

Historic Data Tab of a Ping Sensor

Historic Monitoring Data (Sensors Main Menu)

When you open historic data reports via Sensors | View Historic Data from the main menu, PRTG asks you to select the sensor that you want to create a report for with the object selector.

Historic Monitoring Data Settings

Setting

Description

Sensor

This field is only visible if you open the View Historic Data option from the main menu. To select the sensor that you want to create the report for, click the Search button to open the object selector.

icon-square-cyanFor more information, see section Object Selector.

Start

Specify the start date and time of the data that you want to review. Use the date time picker to enter the date and time.

icon-i-round-redYou cannot start to generate the report if monitoring data has been deleted after the defined start date. Set the start for the report to a date where data is available.

End

Specify the end date and time of the data that you want to review. Use the date time picker to enter the date and time.

Quick Range

In this section, you can use several buttons to select start and end dates more quickly. Click any of these buttons to change the Start and End values:

  • 1 Day, 2 Days, 7 Days, or 14 Days: Set the date range to the respective day or days. The current time of the current day is the end date.
  • Today, Yesterday, Last Week (Mo-Su), Last Week (Su-Sa), Last Month, 2 Months, 6 Months, 12 Months: Set the date range to the last matching period. It starts at 00:00 and ends at 00:00 of the following day.

Average Interval

With this option, you can activate and configure averaging. Select an interval for which PRTG calculates the average value. You can choose from No Interval (no averaging is performed and only raw data displayed), a few seconds, minutes, hours, or a whole day (24 Hours/1 Day). A shorter interval results in a more detailed report for this sensor.

The best settings for you depend on the scanning interval of the sensor, the selected date period, and the intended use for the report. Try different settings and compare the results. See Automatic Averaging in this section.

Channels in Graph

This field is only visible if you view historic data via the Historic Data tab. Select the channels that you want to include in the graph of the report. You can select individual channels via the respective check boxes, and show or hide all channels via the Show all or Hide all buttons. In the graph of the report, PRTG then only shows the data of selected channels.

icon-i-round-blueThe report table always shows the data of all channels.

Cluster Node

This field is only visible if the sensor runs on a cluster probe. Select the cluster node's data that PRTG includes in the report:

  • All nodes: Include the data of all cluster nodes in the report.
  • [Several specific nodes]: Use a specific cluster node's data for the report. The cluster nodes you see are specific to your setup.

File Format

Select the output format for the report:

  • HTML web page: Display the result directly as an HTML web page. This is also a good option if you want to check the results before you export them to a different file format.
  • XML file: Export the data as an .xml file. Usually, your browser shows a download dialog when you use this option.
  • CSV file: Export the data as a .csv file, for example, to import it into Microsoft Excel. Usually, your browser shows a download dialog when you use this option.

Include Percentiles

Setting

Description

Percentile Results

Define if you want to include an additional percentile calculation of your data in the report:

  • Do not show percentiles: PRTG does not use a percentile formula to calculate your monitoring results. It only shows the standard values.
  • Show percentiles: PRTG displays an additional percentile calculation for the primary channel in the table for each scanning interval.

Percentile Type

This field is only visible if you enable Show percentiles above. Enter the percentile type that you want PRTG to use for the calculation. If you choose, for example, to calculate the 95th percentile, enter 95 here and 5 % of peak values are discarded. Enter an integer value.

Percentile Average Interval

This field is only visible if you enable Show percentiles above. Enter a value to define the averaging interval on which PRTG bases the percentile calculation. The default value is 300 seconds (5 minutes). This means that PRTG takes 5-minute averages as basic values for the percentile calculation. Enter an integer value.

Percentile Mode

This field is only visible if you enable Show percentiles above. Select the mode for percentile calculation:

  • Discrete: PRTG takes discrete values to calculate percentile results.
  • Continuous: PRTG interpolates between discrete values and bases the calculation on interpolated values.

Click Start to generate a historic data report.

icon-i-round-redYou cannot start to generate the report if monitoring data has been deleted after the defined start date. Set the start for the report to a date where data is available.

Remarks for Reports

  • Any sensor graph in your report only shows channels that are enabled via the Show in graphs option in the channel settings.
  • Reports show statistics for uptime (Up and Down in percent) and requests (Good and Failed in percent). Values between 5% and 95%, as well as 100% and 0%, are rounded to whole numbers without decimal places. Other values are shown with 3 decimal places.
  • Because of rounding, the statistics in section Sensor Status History of the report might differ from the values in section Uptime Stats by few seconds.
  • Data reporting is limited to 5 requests per minute.
  • Reports cannot show uptime or downtime data for the Sensor Factory sensor.
  • Create reports that include an appropriate amount of data. Reports might not work as expected if too many sensors with short scanning intervals have to be processed. Adjust your report size and the time span that the report covers if necessary.

Automatic Averaging

For performance reasons, PRTG automatically averages monitoring data when calculating data for large time spans. Data is then averaged regardless of the selected average interval.

Time Span in Report

Minimum Level of Detail (Average Interval)

Up to 40 days

Any

40 to 500 days

60 minutes/1 hour or larger

Reports for time spans of more than 500 days are not possible. If you enter a longer time span, it is automatically shortened to 365 days.

icon-i-round-blueUnder certain circumstances, the resulting report might contain a time span that differs from the defined start and end date because of internal averaging processes. When averages are greater than 1 hour and they do not equal 24 hours, and they are combined with certain time spans, the resulting data points might be asynchronous to the time spans. Especially consider this behavior when you use application programming interface (API) calls to generate reports.

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