Anytime you restart your RDBMS, you must then restart AOLserver once
your RDBMS is back up and working.
In principle it would probably be feasible to enhance the AOLserver
database handling code to recover from a restarted RDBMS, but in
practice the need for that is rare, and simply restarting AOLserver is
an easy and fairly non-intrusive way to handle it.
Rocael is right, if you are frequently encountering problems that
force you to restart your RDBMS, something is very wrong; you need to
figure out what and fix it.