Configure how much data to purge from the server

You can:

• Select the type of alarm records to be purged from the alarm database.

• Optionally, archive purged records from the alarm database to files.

• Select the folder location to store the purge log file.

You can select the type of table that needs to be purged, either the AlarmDetail or AlarmConsolidated table.

Notes: The Historian alarm database is named A2ALMDB. Earlier versions of AVEVA System Platform used WWALMDB database rather than A2ALMDB for alarms and events. If you are currently using WWALMDB and want to to use A2ALMDB instead, you may need to change your alarm historization settings from within the System Platform IDE and change your alarm queries to use A2ALMDB.

The Historian A2ALMDB database is created only in Detailed mode, while the InTouch WWALMDB database is supported in both Detailed and Consolidated modes.

All data from the day previous to the number specified is purged. Valid entries are 0-9999. If you select 0, all records are purged from the alarm database except the current day’s records.

To select records to purge

1. Open the Alarm DB Purge-Archive utility. Do the following:

   1. In the Tools view, expand Applications.

   2. Double-click Alarm DB Purge-Archive.

2. Click the General tab.

   

3. In the Purge Properties area, configure the type of records to purge. Do either of the following:

   • Click Detailed Mode to purge alarm records that are saved in the database in Detailed mode.

   • Click Consolidated Mode to purge alarm records that are saved in the database in Consolidated mode.

4. In the Days Online box, type the number of days worth of records to retain in the alarm database.

5. Click Apply.