SHUTDOWN ABORT

I feel powerful executing the above command as a sysadmin 3=) While practicing on my own database for DBA625, I happened to close a session after thinking that zenit has once again frozen. As it turns out, closing session doesn't necessarily end all processes in my database. When I tried logging on again, I got this:


SQL> connect sys as sysdba
Enter password:
Connected to an idle instance.
SQL> startup
ORA-01012: not logged on
SQL> startup mount;
ORA-01012: not logged on

After some googling and deciding that I do not want to mess with resetting memory sizes, I came across "SHUTDOWN ABORT;" and it fixed all my problems.


SQL> SHUTDOWN ABORT
ORACLE instance shut down.
SQL> STARTUP
ORACLE instance started.

Total System Global Area 631914496 bytes
Fixed Size 1338364 bytes
Variable Size 440402948 bytes
Database Buffers 184549376 bytes
Redo Buffers 5623808 bytes
Database mounted.
Database opened.