Field help (APSTYP) 

Used to define if the aggregate in the statistical records is updated in real time or in batch mode.

It is important to note that only the standard triggering events can give rise to real-time aggregations (each time an update is made, the update is carried out). Except in the case or customized statistics, the statistics based on non standard triggering events that can only be updated in batch mode.

For performance reasons, the use of numerous standard aggregations based on a given triggering event can slow the corresponding transaction. It is therefore prudent to have batch based statistics and to plan to have a regular batch task to update them.