Analyzing transaction storage usage

You can analyze the storage usage for one or more Transaction IDs and display the output as a pie chart, a bar chart or a timeline chart.

Pie charts

Pie charts are displayed in the Transaction detail view and show detailed information about a single transaction ID.

To display a Transaction detail view, see the Pie charts section in the Analyzing data topic.

The following screen capture shows the Transaction detail view with the Storage pie chart selected, and showing detailed storage information for the selected transaction ID. The Transaction detail view displays a pie chart for each type of analysis. Each analysis can be selected by clicking the relevant pie chart.

A screen capture showing the pie charts for a single transaction, with the storage chart selected

The Storage analysis displays the following information:
  • A chart title, containing the type of analysis and the name of the transaction being analyzed.
  • A pie chart consisting of two sectors, one for task storage usage greater than16 Megabytes (MB) and one for task storage usage less than 16MB.
  • A table containing the task storage usage, their values, percentage of the total storage, and a further breakdown of the fields. You can click a segment to highlight the details in the table.

By selecting one or more of the check boxes in the view you can choose to hide irrelevant data from the table.

Note: The values displayed in the table are the actual values from the csv file. Because of rounding errors when the data was captured, the sum of the detail might not match the total value. In addition, the percentage figures might not total 100% because of rounding errors.
Some of the storage types break down into the following further DSAs:
  • Greater than 16MB breaks down into CDSA high-water mark average, and UDSA high-water mark average.
  • Less than 16MB breaks down into EUDSA high-water mark average.
The breakdown details are shown in the table.

Bar charts

Bar charts show summary information for multiple transaction IDs. The transaction IDs are displayed in the order in which they are shown in the selection.

To display a Storage bar chart, see the Bar charts section in the Analyzing data topic.

The following screen capture shows a Storage bar chart view containing six different transaction IDs.

A screen capture showing a Storage bar chart containing six transaction IDs.

The chart displays the following information:
  • A view title, containing the name of the analysis; in this case, Storage.
  • An information bar in the view, containing the name of the CSV file that contains the data.
  • A pair of stacked bars for each transaction ID selected. Each bar in a stack consists of one or more sectors, each representing a different DSA. You can hover over a sector to show the type and average size for each DSA.
  • A Legend icon The legend icon in the chart. Click this icon to display the chart legend.

You can use the zoom bar in the chart to change the time scale on the Y-axis to show more detail.

You can perform further analysis on a single transaction ID by selecting a stacked bar, right-clicking and clicking Performance history > Detail breakdown in the pop-up menu. The new information displays as a pie chart in the Transaction detail view.

Alternatively, you can select multiple transaction IDs using the shift or Ctrl keys. Right-click the selection and click one of the options in the pop-up menu. A new bar chart is displayed containing only the selected transaction IDs.

Timeline charts

Timeline charts show all instances of a transaction ID in the selected application ID across the whole data file, or a range of dates specified using the Date dialog when selecting the data. For example, selecting the single record with a transaction ID of CRTP in an application ID of IYCYZC20 displays a bar for every instance of the transaction ID in the application as shown in the following screen capture.

To display a Storage timeline chart, see the Timeline charts section in the Analyzing data topic.

A screen capture showing a Storage timeline chart for all instances of transaction ID CRTP in application ID IYCYZC20.

The chart displays the following information:
  • A view title, containing the name of the analysis; in this case, Storage.
  • An information bar in the view, containing the path and name of the CSV or database file that contains the data.
  • Stacked bars consisting of one bar for each instance of the selected transaction ID in the application ID. Each bar in a stack consists of one or more sectors, each representing a different storage DSA.
  • A Legend icon The legend icon in the chart. Click this icon to display the chart legend.

You can use the zoom bar in the chart to change the time scale on the Y-axis to show more detail.

You can perform further analysis on a single transaction ID by selecting a stacked bar, right-clicking and clicking Performance history > Detail breakdown in the pop-up menu. The new information displays as a pie chart in the Transaction detail view.

Alternatively, you can select multiple transaction IDs using the shift or Ctrl keys. Right-click the selection and click one of the options in the pop-up menu. A new bar chart is displayed containing only the selected transaction IDs.

The performance history works primarily from the performance summary rather than statistics tables. However, you can access performance history records from the Reports view or other perspectives (for example CICS® IA).