This is what I have on one of my machines inside the /etc/system file for oracle :

* Begin Oracle requirements
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=50
set semsys:seminfo_semmns=2048
set semsys:seminfo_semmni=512
set semsys:seminfo_semmsl=1024
set semsys:seminfo_semopm=100
set semsys:seminfo_semvmx=32767
set shmsys:share_page_table=1
* End Oracle requirements


Please also note that if the value for java_pool_size is less than 1MB your instance
would not start (8.1.5 bug).