An HDB (Historical Database) is a definition that allows you to collect, report and manage CICS® statistics and transaction performance data. In the CICS PA Historical Database environment, you can create as many HDBs as required.
There are two types of Performance HDB, List and Summary, where the HDB type is determined by the Template. There is a third type of HDB, Statistics, for CICS Statistics and Server statistics data and CICS Transaction Gateway statistics data. For a Statistics HDB, instead of a Template, you select from a menu the statistics categories and reports that identify the data that you want collected.