Historical Data Screen

Description of the TrueNAS Connect Historical Data screen, graphs, dialogs, and fields.
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Historical Data Screen

The Historical Data screen shows statistical data graphs of system CPU usage and temperature, memory (ARC, physical, and L2ARC), and demand data. The time period these graphs show changes based on the selection in the data picker dialog.

Filter

The Filter field shows the time period for the data shown in the historical statistical charts. The default is Last 1 Hour. After changing the time option, the time period changes to a specific date or a date range.

Historical Filter Button

The Historical Filter button opens the Data Picker.

Export Button

The Export button opens the Export Historical Data dialog.

Export Historical Data

The Export Historical Data dialog exports the statistical data for the selected system in the selected file format.

OK starts the export and closes the dialog. Cancel closes the dialog.

Format

The Format dropdown shows two file type options, JSON and CSV.

Data Picker Dialog

The data picker dialog opens showing the date options and a calendar.

Date Options

The date options set the time period shown in the historical statistical graphs. Selected option changes the text in the Filter field.

The selectable time period options for statistical data:

  • Last 1 Hour - Default time period. The filter field shows this text.
  • Today - Shows data for the current calendar date. The filter field shows the current calendar date.
  • Yesterday - Shows data for the preceding date. The filter field shows the previous calendar date.
  • Custom - Shows data for the date range selected. The filter field shows the date range.

Calendar

The calendar shows the month and day for the selected option.

Historical Statistics Graphs

The Historical Data screen shows historical statistical graphs in six categories:

  • CPU Usage
  • CPU Temperature
  • ARC Available Memory
  • Physical Memory Available
  • L2ARC Access Hit Percentage
  • Demand Data Hit Percentage

Data shown in these statistical graphs varies based on the selected option in the Data Picker dialog.

Alerts Panel

The alerts panel on the right of the Historical Data screen shows alerts for the selected system.