ASA Database Administration Guide
The Database Server
The database server
Database server options
Unload database after last connection is dropped.
{ dbsrv9 | dbeng9 } -ga ...
All operating systems except NetWare.
Specifying this option on the network server causes each database to be unloaded after the last connection to it is dropped. In addition to unloading each database after the last connection is dropped, the personal server shuts down when the last database is stopped.