HiRDB predicts a scheduled database maintenance date based on the historical trend of the percentage of segments used in an RDAREA. The following figure provides an overview of how HiRDB analyzes prediction data.

Figure 13-10 Overview of how HiRDB analyzes prediction data

Explanation

• The date on which the percentage of segments being used in the RDAREA is predicted to exceed the standard value (the default is 80%) is used as the scheduled database maintenance date.
• You can change the standard value in the standard value definition file. For details about the standard value definition file, see the manual HiRDB Version 9 Command Reference.

If the standard value is not appropriate for your operations, such as when the storage conditions change before the predicted database maintenance date because initial data loading is performed periodically, you can change the standard value to customize the reorganization time prediction performed by HiRDB.