Rules and Guidelines for Performance Line Charts

Several rules govern the creation of a line chart for performance metrics, as listed in the following table.

Rule for Performance Metrics Line Charts	Description/Example
1. If aggregation is defined for a line, all lines must have an aggregation specified.	See Aggregation Functions. See Line Chart Field Requirements.
2. The Group By scope selector component is required only if the lines have aggregation functions applied.	See Dynamic Template Scope Selector Components.
3. If no aggregation has been specified for lines, the raw data will be returned in the report.	Array performance data is captured and stored as raw, hourly, and daily records. When raw data is used, the dates reflect exactly when the data was captured, including the seconds.
4. A date field should be defined as the caption.	This provides the x-axis time period markers. Note that time-series charts automatically calculate the x-axis labels based on the data. Therefore, your Group By selection in the scope selector may not always render with the set of dates that you expect for the time period.
5. The Time Period scope selector is always required for performance line charts.	Performance metrics are best represented as time-series charts. See Dynamic Template Scope Selector Components.
6. Use the Add Groupoption to create folders when you need to group data fields that have disparate units of measure.	For example, you might have a capacity value in KiB, but a performance value in Kbps. This requires two charts with different metrics scales to plot the values. See Add a Group to Create Separate Line Charts in a Report.