The AutoCollect databases provide a persistent repository for various environmental and statistical information extracted from the MUF Dynamic System Tables.
In addition to providing a repository for the DST information, the AutoCollect functions provide simple ways to create performance measurements and resource utilization based on pre-determined time schedules. Using AutoCollect, you can capture usage information based on processing schedules such as prime shift, overnight, and weekends.
In addition to collecting the statistics and calculating the usage amounts (known as the Deltas), the AutoCollect tool automatically calculates various business value measurements such as database request process per CPU second, database requests per elapsed second, and database requests per physical I/O. With the business value measurements, AutoCollect also generates a business value details table that has a large number of common SYSPROG ratios used to measure the CA Datacom environment.
The overhead to collect the information is minimal. The work to process the statistics in usable Deltas and present the information has a relatively small resource footprint. The management process can also be offloaded to a non production MUF for processing to remove any load from the production systems.
While most users have a variety of home grown tools to measure performance, the AutoCollect system provides a standard implementation that every z/OS CA Datacom site can use.
Business Value
AutoCollect provides a straightforward simple process to collect statistics and generate performance metrics that can be compared from one MUF to another or even one site to another.
AutoCollect measurements can be used to locate opportunities for tuning to produce improved performance, as well as provide the means to verify the effect of any change. This includes not just tuning changes, but also changes such as new software in the operating system, CICS, CA Datacom releases, and more, and new hardware such as CPU, DASD, and memory. You can also use it to track processing growth due to increased transactions, as well as processing growth due to application changes.
Additional Considerations
For the AutoCollect function to work, you must have the Dynamic System Tables Database enabled.
All of the AutoCollect processes are executed using the CA Datacom/DB DBUTLTY AUTOCOLL function. For more information on this function, see the CA Datacom/DB DBUTLTY Guide.
For detailed implementation and usage information as well as recommended implementation scenarios, see the newly created CA Datacom/DB AutoScope User Guide.
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