Manage the AVEVA Historian runtime database

The Runtime database is a SQL Server database and can be managed with SQL Server Management Studio. The Runtime database stores relatively static information about how the AVEVA Historian is configured, such as tag definitions and I/O Server definitions.

Although the Runtime database does not store historical plant data, it stores other types of system-generated data that impacts the size of the database file. For example, information is added to the database file if you:

• Turned on modification tracking, because a record is stored for each modification made. For more information, see Track modifications.

• Defined any events in the classic event system. Each detected event is logged in the Runtime database. If you configured any summary actions, the summarized values are stored in the Runtime database. Also, if you set up event snapshot actions, the values for the snapshots are logged in the database. For more information, see Classic event subsystem.

Be sure that you have enough disk space to accommodate a growing Runtime database file. By default, the Runtime database is configured to expand automatically when required.