--安装背景

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上次碰到问题，cursor：mutex S导致的load过高， 有说可以升级到11.2.0.4就能避免这种问题，所以准备重新搭建新版本11.2.0.4。

安装环境是：azure云 linux centos6.5。

1，修改内核

1.1 修改sysctl.conf文件

[root@orcltest Downloads]# vim/etc/sysctl.conf

# add by tim.man

kernel.shmmax = 277495689510912

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

net.core.rmem_default = 262144

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 1048586

fs.file-max = 6815744

 

# Controls the maximum number of shared memory segments, in pages                              

kernel.shmall = 4294967296

net.ipv4.tcp_max_tw_buckets = 6000

net.ipv4.ip_local_port_range = 9000 65500

net.ipv4.tcp_tw_recycle = 0

net.ipv4.tcp_tw_reuse = 1

net.core.somaxconn = 262144

net.core.netdev_max_backlog = 262144

net.ipv4.tcp_max_orphans = 262144

net.ipv4.tcp_max_syn_backlog = 262144

net.ipv4.tcp_synack_retries = 2

net.ipv4.tcp_syn_retries = 1

net.ipv4.tcp_fin_timeout = 1

net.ipv4.tcp_keepalive_time = 30

net.ipv4.tcp_keepalive_probes = 6

net.ipv4.tcp_keepalive_intvl = 5

net.ipv4.tcp_timestamps = 0

fs.aio-max-nr = 1048576

本文标题：oracle11g最终版本11.2.0.4安装详细过程介绍-创新互联
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