今天在搭建10g RAC的时候配置内核参数出现如下问题，记录下来。
以roo用户登录，按照Oracle 10g官方文档，起初对 /etc/sysctl.conf 的配置如下：

kernel.shmmax = 3126704128
kernel.shmall = 2097152
kernel.shmmni = 4096
kernel.sem = 25032000100128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 102465000
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144

使配置文件生效，出现如下错误提示：

[root@HHDB120 ~]# /sbin/sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 3126704128
kernel.shmall = 2097152
kernel.shmmni = 4096
kernel.sem = 25032000100128
fs.file-max = 65536
error: "Invalid argument" setting key "net.ipv4.ip_local_port_range"
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144

这个配置参考于cache服务器varnish的推荐配置和SunOne 服务器系统优化的推荐配置。这里有个对端口范围的限制如果不做修改原始的返回只有2.8万个port区间。
对上述内存参数的具体操作命令示例：
查看端口范围，如下：

[root@HHDB120 ~]# sysctl -a | grep range
net.ipv4.ip_local_port_range = 32768 61000

修改内核参数的配置net.ipv4.ip_local_port_range，将其值修改为3276861000
使配置生效如下：

[root@HHDB120 ~]# /sbin/sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 3126704128
kernel.shmall = 2097152
kernel.shmmni = 4096
kernel.sem = 25032000100128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 32768 61000
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144

配置生效，无错误提示，问题解决。

ITPub博客

error: "Invalid argument" setting key "net.ipv4.ip_local_port_range"

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