tips of installation oracle 9i (9.2.0) on redhat linux 7.1 ---------------------------------------------------------- Shared Memory For Oracle 9i (9.2.0) installation I had to increase the maximum shared memory size on my Linux server. The Oracle Database Configuration Assistant printed the following error message on my server: ORA-27123: unable to attach to shared memory segment. I temporarely increased the shmmax setting for the kernel by executing the following command: [root@portal /root]# cat /proc/sys/kernel/shmmax 33554432 [root@portal /root]# echo `expr 1024 \* 1024 \* 1024` > /proc/sys/kernel/shmmax [root@portal /root]# cat /proc/sys/kernel/shmmax 1073741824 It is recommended to increase the shmmax setting permanently for Oracle. So if you want to increase the maximum shared memory size permanently, add the following line to the /etc/sysctl.conf file: kernel.shmmax=1073741824 [root@portal /root]# cat /etc/sysctl.conf # Disables packet forwarding net.ipv4.ip_forward = 0 # Enables source route verification net.ipv4.conf.all.rp_filter = 1 # Disables the magic-sysrq key kernel.sysrq = 0 kernel.shmmax=1073741824 |