~Performance Queries: Chart View Options~

The Chart view displays requested performance parameters in a variety of chart forms. The colors, organization and structure of the charts facilitate viewing and analysis of information. In addition, instead of displaying all the data at once (as in the Grid view), chart views display results in a stratified form, making it easier to analyze specific chunks of information.

Chart views are dynamic views in which data can be manipulated and filtered on the fly. Charts thus provide an efficient means of focusing on selected information and analyzing data in a specific context. The Navigator displays the following types of charts:

  • Line
  • STD Line
  • Simple Column
  • Grouped Column
  • Simple Pie
  • Bubble

For details about each chart type, refer to Chart Forms.

Setting the Y-axis Parameter

By default, the Navigator generates 2 charts that are viewed simultaneously. The top one displays values of measurements and the bottom displays the volume of the measurements and their status.

The charts share an X-axis parameter of time. The default Y-axis parameter of the upper chart is the average value of the selected performance metric, but it can be changed by the user to any of the following parameters:

  • Volume: The Y axis represents the total number of activities or system attributes measured during the selected timeframe.
  • Sum: The Y axis represents the sum of the measurements for the selected timeframe. This option is useful when the information displayed shows subcomponents of a selected module. Therefore, the sum is the most meaningful value for analyzing the complete scenario. For example, when examining CPU usage of a process including all the modules, it would be logical to sum the CPU measurements of all the modules.
  • Total: The Y axis represents the sum of the values measured on the X axis. This option is useful when analyzing availability parameters, e.g., Not Responding errors. In this case, the Y axis value is the total time (in seconds) during the selected time period that an application was not available.
  • Max: The Y axis represents the highest measurement. This option is useful when looking for peaks in bad performance. In this situation, it is important to be able to see the worst measurements/exceptions for any component viewed. When viewing average measurements, the peaks may be hidden.
Note:

In bubble charts, the Y axis parameter is variability. Y-axis parameter selection is not relevant to this chart form.

The default Y-axis parameter of the lower chart is the volume of measurements according to status (Normal, Critical, etc.). Users can change this parameter to show volume only (without status), or they can hide the lower chart.

Sorting and Filtering Chart Data

The Sort feature enables users to sort performance information displayed in Chart views according to the following criteria, in either ascending or descending order:

  • Average Value: Data is sorted by the average value of the attribute measured on the Y axis.
  • Volume: Data is sorted by total number of activities or system attributes measured.
  • Field Name: Data is sorted by the label of the system attributes on the X axis. This is the default view.

When a performance query generates a large number of results, a chart can be filtered to facilitate viewing and data analysis. The Navigator filters charts according to numerical value of the results. Results with higher numerical values appear, and results with lower numerical values are filtered out.

By default, when filtering is selected, charts are filtered to display the 10 highest values (for example, the 10 activities with the highest Application Response). Users can adjust the number of values displayed.

Note:

The minimum filter value is 2.

Drilling Down

When a chart is generated, the default display provides a general summary of performance information about selected parameters. The Drill Down feature enables users to redraw the chart to display more detailed information about certain specified results. The view can be gradually narrowed and refined until very specific data is displayed.

When any area of a chart is selected (e.g., one of the bars in a column chart), the view changes to display information about the selected area, according to the next consecutive parameter in the Drill Down Stack. During drill down, the path of the current drill down view appears at the top of the Data Display area. In the Drill Down Stack, the row of the displayed drill down level is highlighted in blue. In addition, a visual display of the drill down path appears in the lower left corner of the Chart View screen.

Drill Down Order

The sequence in which drill down parameters appear is determined by the order in the Drill Down Stack. The parameters displayed in the Drill Down Stack are set before chart generation, according to comparison categories selected (Analyze tab) or the order of information appearing in the Troubleshoot tables (Troubleshoot tab). Once a chart is generated, the sequence of items in the Drill Down Stack can be changed using drag-and-drop.

Once drill down has begun, the Drill Down Stack can be used to navigate among previously viewed screens. The navigation function of each row in the Drill Down Stack becomes activated upon display of that drill down level in the Data Display area. Clicking the Up/Down options displays the chart of the drill down parameter immediately above/below the currently selected parameter in the Drill Down Stack.