Space management for event and summary history

If you configured AVEVA Historian to detect events using the Classic Event subsystem, each detected event is logged into the EventHistory table of the Runtime database. If you configured summary actions, the aggregated values are stored in the SummaryHistory table. The duration for which event and summary history are kept are specified by the EventStorageDuration and SummaryStorageDuration system parameters, respectively.

Duration defaults are as follows:

For information on changing the value of a system parameter, see Edit system parameters.

For more information on the Classic Event subsystem, see Classic event subsystem.