インストール前の準備（カーネルパラメータ）

【カーネルパラメータ：Clusterwareインストール要件】

↓まず、修正前の値を確認。必要なものだけ値を変更する。

[root@db02eth0 ~]# /sbin/sysctl -a | grep sem
kernel.sem = 250        32000   32      128
[root@db02eth0 ~]# /sbin/sysctl -a | grep shm
vm.hugetlb_shm_group = 0
kernel.shmmni = 4096
kernel.shmall = 268435456
kernel.shmmax = 4294967295
[root@db02eth0 ~]# /sbin/sysctl -a | grep file-max
fs.file-max = 780841
[root@db02eth0 ~]# /sbin/sysctl -a | grep aio-max
fs.aio-max-nr = 65536
[root@db02eth0 ~]#
[root@db02eth0 ~]# /sbin/sysctl -a | grep ip_local_port_range
net.ipv4.ip_local_port_range = 32768    61000
[root@db02eth0 ~]# /sbin/sysctl -a | grep net.core.rmem
net.core.rmem_default = 110592
net.core.rmem_max = 131071
[root@db02eth0 ~]# /sbin/sysctl -a | grep net.core.wmem
net.core.wmem_default = 110592
net.core.wmem_max = 131071
[root@db02eth0 ~]#
[root@db02eth0 ~]#
[root@db02eth0 ~]# vi /etc/sysctl.conf
[root@db02eth0 ~]# 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

# Controls the maximum size of a message, in bytes
kernel.msgmnb = 65536

# Controls the default maxmimum size of a mesage queue
kernel.msgmax = 65536

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 4294967295

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 268435456

#for Oracle11gR1 RAC
#kernel.shmall = 2097152
#kernel.shmmax = 2147483648
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
#fs.file-max = 65536
fs.aio-max-nr=1048576
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 4194304
[root@db02eth0 ~]#

↑"#for Oracle11gR1 RAC"以下が付け加えた行。