As needed, sets sysctl.conf settings, system startup parameters, and driver parameters to values based on recommendations from the Oracle Preinstallation RPM program
Sets hard and soft resource limits
Sets other recommended parameters, depending on your kernel version
此安装包位于操作系统安装盘的Packages目录下。
点击(此处)折叠或打开
# cd /mnt/install_DVD
# cd Packages
# ll | grep preinstall
-rw-r--r-- 1 root root 15524 Jan 16 2013 oracle-rdbms-server-11gR2-preinstall-1.0-7.el6.x86_64.rpm
# rpm -ivh oracle-rdbms-server-11gR2-preinstall-1.0-7.el6.x86_64.rpm
安装包修改/etc/sysctl.conf的内容如下：其中标有oracle-rdbms-server-11gR2-preinstall字样注释的便是安装包所添加的参数。
# cat /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
# Disable netfilter on bridges.
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
# Controls the default maxmimum size of a mesage queue
kernel.msgmnb = 65536
# Controls the maximum size of a message, in bytes
kernel.msgmax = 65536
# Controls the maximum shared segment size, in bytes
# Controls the maximum number of shared memory segments, in pages
# oracle-rdbms-server-11gR2-preinstall setting for fs.file-max is 6815744
fs.file-max = 6815744
# oracle-rdbms-server-11gR2-preinstall setting for kernel.sem is '250 32000 100 128'
kernel.sem = 250 32000 100 128
# oracle-rdbms-server-11gR2-preinstall setting for kernel.shmmni is 4096
kernel.shmmni = 4096
# oracle-rdbms-server-11gR2-preinstall setting for kernel.shmall is 1073741824 on x86_64
# oracle-rdbms-server-11gR2-preinstall setting for kernel.shmall is 2097152 on i386
kernel.shmall = 1073741824
# oracle-rdbms-server-11gR2-preinstall setting for kernel.shmmax is 4398046511104 on x86_64
# oracle-rdbms-server-11gR2-preinstall setting for kernel.shmmax is 4294967295 on i386
kernel.shmmax = 4398046511104
# oracle-rdbms-server-11gR2-preinstall setting for net.core.rmem_default is 262144
net.core.rmem_default = 262144
# oracle-rdbms-server-11gR2-preinstall setting for net.core.rmem_max is 4194304
net.core.rmem_max = 4194304
# oracle-rdbms-server-11gR2-preinstall setting for net.core.wmem_default is 262144
net.core.wmem_default = 262144
# oracle-rdbms-server-11gR2-preinstall setting for net.core.wmem_max is 1048576
net.core.wmem_max = 1048576
# oracle-rdbms-server-11gR2-preinstall setting for fs.aio-max-nr is 1048576
fs.aio-max-nr = 1048576
# oracle-rdbms-server-11gR2-preinstall setting for net.ipv4.ip_local_port_range is 9000 65500
net.ipv4.ip_local_port_range = 9000 65500
5.配置Oracle网络
I.硬件配置要求
每个服务器节点至少需要2块网卡，一块对外网络接口，一块私有网络接口（心跳）。
如果你通过OUI安装Oracle集群软件，需要保证每个节点用于外网或私网接口（网卡名）保证一致。比如，node1使用eth0作为对外接口，node2就不能使用eth1作为对外接口。
II.IP配置要求
存在为集群服务的DHCP
DHCP能为每个节点提供足够的IP，一个虚拟IP、3个SCAN IP
III.非GNS下手动配置IP实例
6.检查操作系统软件包
首先，根据操作系统版本到官方文档中找到安装包需求列表，如下图
可以通过mount安装盘或直接通过yum源检查和安装所需要的包：
# rpm -qa packages_name
# rpm -ivh packages_name
# yum list packages_name