ORA-27102 /etc/system
Sun Solaris 10

SQL> startup
ORA-27102: out of memory
SVR4 Error: 22: Invalid argument

Add to /etc/system

set semsys:seminfo_semmni=100
set semsys:seminfo_semmsl=256
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmni=100

and reboot.