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Simple graphs are provided for the visualization of data gathered by items.
No configuration effort is required on the user part to view simple graphs. They are freely made available by Zabbix.
Just go to Monitoring → Latest data and click on the Graph link for the respective item and a graph will be displayed.
Take note of the time period selector above the graph. It allows you to select the desired time period easily.
The slider within the selector can be dragged back and forth as well as resized. Links are also provided within the selector allowing to choose often-used predefined periods and move them back and forth in time.
For very recent data a single line is drawn connecting each received value. The single line is drawn as long as there is at least one horizontal pixel available for one value.
For data that show a longer period three lines are drawn - a dark green one shows the average, while a light pink and a light green line shows the maximum and minimum values at that point in time. The space between the highs and the lows is filled with yellow background.
Working time (working days) is displayed in graphs as a white background, while non-working time is displayed in grey (with the Original blue default frontend theme).
Working time is always displayed in simple graphs, whereas displaying it in custom graphs is a user preference.
Working time is not displayed if the graph shows more than 3 months.
Graphs can be drawn based on either item history or trends. A grey caption at the bottom right of a graph indicates where the data come from.
Two factors influence whether history of trends is used:
A dropdown on the upper right above the graph allows to switch from the simple graph to the Values/500 latest values listings. This can be useful for viewing the numeric values making up the graph.
The values represented here are raw, i.e. no units or postprocessing of values is used. Value mapping, however, is applied.