Clumon Recorder

Graphs

1. Graphs will display any data set containing at lesat one data point.

   • The data is not required to be complete for the range requested.
   • A graph will display blank areas when data available is not sufficient.
     This indicates that the data does not fully cover the entire range desired. Try updating the interface to use one of the longer term data sources.
   • Points spaced at irregular intervals may indicate a disruption is the usual data collection schedule.
   • In a line graph, a data gap may appear as a long straight line between distanced data points.
     Change the graph type to 'Bar', to more clearly see time ranges where data collection may be missing.
   • "No data or Error" will only be displayed if the data set is completely empty, or if an error occurred.

2. The information displayed in the statistics area next to a graph relates exactly to the data being displayed.

   • The Minimum and Maximum displayed correspond to the highest and lowest data points displayed on the graph.
   • The Mimimum and Maximum displayed are not necessarily the Minimum or Maximum for the entire metric.
     Higher and lower values may exist in other instances of the metric, or outside the date range being displayed.

3. The top and bottom of a graph are based on the minimum and maximum values in the entire data set for the metric.

   • The top and bottom of the graph are based on extrema from the entire metric, including instances other than the instance being graphed.
   • The top and bottom of the graph are based on extrema from the entire date range available, including data outside the date range shown in the graph.
   • Therefore, instances from the same metric are displayed with the same visual maximum and minimum.
   • If a graph line touches the highest point on the graph, then this data point is the highest for any instance in this metric in this datasource.
   • The top and bottom of the graph will fluctuate as the oldest data expires from the dataset.
     (Example: The tops of all graphs in the current metric will become lower when the current highest data point expires from the data set due to old age.)

4. Negative change is not displayed on a Delta-Line (Growth Line) graph.

   • Delta-line (Growth Line) graphs are intended for viewing metrics which will always increase in normal operation.
   • The Delta Line (Growth Line) was created specifically for displaying Bandwidth,
     since Byte count increase over time is the information of interest.
   • The lowest value shown is zero, indicating no increase. Negatives values are rounded up to zero.
   • Negative values may occassionally occur when the metric is reset, but are not shown in this display method.
     These values will be drasticly larger than the normal values, and would disrupt the graph if displayed normally.
     If it is necessary to look for these occurrences, change the graph type to 'Line' or 'Bar'.