It is a table containing the session details i.e., the logged in and logged out information. These entries are not used by the application and can be removed periodically for better database performance. By default, the session details are deleted once in every 90 days but for better performance, you can increase the cleanup frequency.
Example: If you want to cleanup the ACC Session every 30 days then use the query,
update GlobalConfig set PARAMVALUE=30 where CATEGORY=’CLEANUP_TASK’ and PARAMETER=’CLEANUP_ACC_SESSION_LIMIT’;
The maximum limit for cleaning up the ACC session details is 365. If you want to disable the cleanup, then set the parameter as -1.