Historical data files
Historical performance data is generated from the management collection objects maintained by Collection Services. The task in IBM Navigator for i can be used to analyze the historical performance data in chart or table form. Use this topic to find the names, descriptions, and attributes of the historical database files.
Historical performance data is data that is collected by Collection Services that is reduced and summarized with the intent of providing data to be kept for a long time. The data is intended to be just a subset of all the original Collection Services collected data.
Collection Services collects performance data into a management collection object (*MGTCOL). If historical data creation is enabled in the Collection Services configuration, then historical data is automatically created for you at Collection Services cycle time. You also can select to create historical data at any time for a selected Collection Services management collection object. The Collection Services management collection object must contain data that was collected on the same partition and that falls within the retention periods you configured for keeping historical data.
Additional field information, such as number of bytes and buffer position, is available by using the Display File Field Description (DSPFFD) command. For example, type the following command on any command line:
DSPFFD file(QSYS/QAPMHCONF)