Set_Kernel_Parameters.rtf

Set Kernel Parameters

1.Oracle recommend the following minimum parameter settings:

Add or amend the following lines in the "/etc/sysctl.conf" file.

[root]# 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 = 1024 65500

net.core.rmem_default=262144

net.core.rmem_max=4194304

net.core.wmem_default=262144

net.core.wmem_max=1048586

2.Run the following command to change the current kernel parameters:

[root]# /sbin/sysctl -p

3.Add the following lines to the /etc/security/limits.conf file:

[root]# vi /etc/security/limits.conf

oracle              soft    nproc   2047

oracle              hard    nproc   16384

oracle              soft    nofile  1024

oracle              hard    nofile  65536

4.Add the following line to the /etc/pam.d/login file, if it does not already exist:

[root]# vi  /etc/pam.d/login

session    required     pam_limits.so

5.Disable secure linux by editing the /etc/selinux/config file, making sure the SELINUX flag is set as follows:

[root]# vi  /etc/selinux/config

# This file controls the state of SELinux on the system.

# SELINUX= can take one of these three values:

#       enforcing - SELinux security policy is enforced.

#       permissive - SELinux prints warnings instead of enforcing.

#       disabled - SELinux is fully disabled.

SELINUX=enforcing을 SELINUX=disabled로 수정

6.hosts 파일을 내용을 확인하고 필요하면 수정한다.

[root]# vi  /etc/hosts

127.0.0.1       localhost

192.168.0.10    ora10gr2.gsedu.com ora10gr2 localhost.localdomain localhost

7.커널 설정을 마쳤다면 Virtual Machine을 복사하기 위해 시스템을 종료한다.

[root]# shutdown -h now