Analyzing transaction storage usage
You can analyze the storage usage for a transaction ID and display the output as a pie chart or a timeline chart. You can analyze the storage usage for multiple transaction IDs and display the output as a bar chart.
Pie chart
The Storage usage pie chart is displayed in the Transaction detail view and shows an analysis summary for a specific transaction ID over a time interval.
To display a Storage usage pie chart, see Pie charts and select the Storage usage thumbnail.
This chart is divided into three sectors, one for each CICS Dynamic Storage Area (DSA). Each sector shows the GETMAIN requests and high-water mark values for the different types of CICS storage that the transaction used in that DSA. This chart represents the amount of storage used, not the amount of storage available.

- A summary of the Transaction ID in the time period chosen, including
the following information:
- The number of transactions
- The average response time
- The average user dispatch time
- The average suspend time per transaction
- A pie chart in three sectors:
- Task storage usage below 16 MB. This usage is broken down further into CDSA and UDSA.
- Task storage usage above 16 MB but below 2 GB. This usage is broken down further into ECDSA and EUDSA.
- Task storage usage above the bar. This usage is broken down further into GCDSA and GUDSA.
If task storage usage breaks down into further detail and that usage has a value to show, the pie chart shows the relevant subsection in the sector. You can click an area in the pie chart to highlight the relevant entry in the table.
You can use the check boxes to hide irrelevant data from the table.
- A table that shows the task storage types and the following values
for each one:
- GETMAIN count
- High water mark
- Storage occupancy
- A table that shows the shared storage types and the following
values for each one:
- Average GETMAIN count
- Average GETMAIN bytes
- Average FREEMAIN bytes
Bar charts
The Storage usage bar chart shows 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 usage bar chart, see Bar charts and select the Storage usage option.

- The view title shows the source of the data and the analysis type.
- The information line shows the selection criteria for the data the records were selected from, for example, APPLID and time period.
- Legend icon
. Click this icon to display the chart legend for the segments in the current chart.
- Up to three stacked bars for each selected transaction ID; for task storage below 16 MB, task storage above 16 MB but below 2 GB, and task storage above the bar. Each bar in a stack has one or more segments to represent different DSAs. You can hover over a segment to show the type of DSA and average GETMAIN request value for that DSA.
To change the time scale on the vertical axis of the chart and show more detail, you can use the zoom bar.
To analyze a transaction ID further, right-click a bar, then use the menu options to select a performance summary (pie chart) or timeline analysis.
Timeline chart
A timeline chart displays all instances of a transaction ID in the selected APPLID across either all the data, or the data in a specified period.
To display a Storage usage timeline chart, see Timeline charts and select the Storage usage option.

- The view title shows the source of the data and the analysis type.
- The information line shows the selection criteria for the data the records were selected from, for example, APPLID, transaction ID, and time period.
- Legend icon
. Click this icon to display the chart legend for the segments in the current chart.
- Stacked bars consist of one bar for each instance of the selected transaction ID in the APPLID. Each bar in a stack consists of one or more segments to represent a different DSA. You can hover over a segment to show the type of DSA and average GETMAIN request value for that DSA.
To change the time scale on the vertical axis of the chart and show more detail, you can use the zoom bar.
To analyze an instance of a transaction further, right-click a bar, then use the menu options to select a performance summary (pie chart) or timeline analysis.