oracle out of memory

有一台服务器,操作系统是solaris x86(32),机器有16G内存,安装oralce10.2,如果分配给oracle的内存大,就报out of memory错误,现在只能分配小于4G的内存.  如何解决?

/etc/system参数

set rlim_fd_max=65536
set shmsys:shminfo_shmmin=1
set semsys:seminfo_semmap=900
set semsys:seminfo_semmnu=1024
set semsys:seminfo_semume=200
set semsys:seminfo_semopm=100
set semsys:seminfo_semvmx=32767

set rlim_fd_cur=8192
set semsys:seminfo_semmni=1024
set semsys:seminfo_semmns=1024
set semsys:seminfo_semmsl=256
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmseg=1200
set shmsys:shminfo_shmmni=1024
set msgsys:msginfo_msgmax=8192
set msgsys:msginfo_msgmni=50
set msgsys:msginfo_msgtql=2000
set msgsys:msginfo_msgmnb=200000

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谢谢