1- Edit hosts file.
$vi /etc/hosts
<IP-address> <fully-qualified-machine-name> <machine-name>
192.168.0.2 node1.localdomain node1
2- Set kernel parameters in sysctl.conf file. These values are suggested by Oracle. According to your server, you can change some values.
$vi /etc/sysctl.conf
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 536870912
kernel.shmmni = 4096
# semaphores: semmsl, semmns, semopm, semmni
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 4194304
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
The server must be restarted for applying the changes. Or you can do that with following command.
$/sbin/sysctl –p
– kernel.shmmax parameter must be equal to half of the physical memory
– kernel.shmall paramter must be equal to page size.
3- Set limit values in limits.conf file.
$vi /etc/security/limits.conf
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
4- Open /etc/pam.d/login file and add following line.
$vi /etc/pam.d/login
session required pam_limits.so
5- You must disable SELINUX. Edit /etc/selinux/config file to disable it.
$vi /etc/selinux/config
SELINUX=disabled
$vi /etc/hosts
<IP-address> <fully-qualified-machine-name> <machine-name>
192.168.0.2 node1.localdomain node1
2- Set kernel parameters in sysctl.conf file. These values are suggested by Oracle. According to your server, you can change some values.
$vi /etc/sysctl.conf
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 536870912
kernel.shmmni = 4096
# semaphores: semmsl, semmns, semopm, semmni
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 4194304
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
The server must be restarted for applying the changes. Or you can do that with following command.
$/sbin/sysctl –p
– kernel.shmmax parameter must be equal to half of the physical memory
– kernel.shmall paramter must be equal to page size.
3- Set limit values in limits.conf file.
$vi /etc/security/limits.conf
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
4- Open /etc/pam.d/login file and add following line.
$vi /etc/pam.d/login
session required pam_limits.so
5- You must disable SELINUX. Edit /etc/selinux/config file to disable it.
$vi /etc/selinux/config
SELINUX=disabled