Are we talking an Oracle issue here? The shared memory info. is contained with the file /etc/system and can be amended using vi as required. If this is not clear, post the relevant part of your /etc/system file, my entries, for example, are:
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10
You'll need to reboot the box for any changes to take effect. HTH.