Quickly delete 100,000 alarms and a lot of old trend data


My Server has a 100,000 alarms and a lot of old trend data.  How can I delete them quickly?

Product Line

TAC I/A Series


I/A Series R2 Niagara


The APP folder under the station holds all alarm and trended data.  When this folder gets too big, i.e. >500 MB the Server functionality can slow down while working with this large database file.


  1. Stop the Server station
  2. Rename the existing APP folder to something other than APP
  3. Restart the Server station.  When the Server station restarts it will check for the presence of a folder called APP and when none is found it will create a new one and use that one to archive alarms and trend data.