We recently upgraded our Enterprise application and everything worked ok until one weekend when we did a server reboot, ever since then we have run into memory errors. The server has 4GB of physical memory installed and the kernel parameters are set to the following (/etc/system). I'm not an Oracle guy so I'm not sure where to start looking but any informaiton is greatly appreciated. Thanks in advance.

There are two databases running on this server, one is a production database and the other is a pre-production database.

[root@bandb /]# cat /etc/system | grep seminfo
set semsys:seminfo_semmni=100
set semsys:seminfo_semmns=2048
set semsys:seminfo_semmsl=400
set semsys:seminfo_semopm=100
set semsys:seminfo_semvmx=32767
[root@bandb /]# cat /etc/system | grep shminfo
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10
[root@bandb /]#