Linux参数调优

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# 一般服务器调整  #
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#最大连接数
net.core.somaxconn = 32768
#内存分配策略 1表示内核允许分配所有的物理内存，而不管当前的内存状态如何
vm.overcommit_memory = 1
#修改消息队列长度
kernel.msgmnb = 65535
kernel.msgmax = 65535
#允许系统打开的端口范围
net.ipv4.ip_local_port_range = 10240 61440
#当keepalive 起用的时候，TCP 发送keepalive 消息的频度。缺省是2小时,单位秒
net.ipv4.tcp_keepalive_time = 1800
#关闭ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

###########参数复制版############
net.core.somaxconn = 32768
vm.overcommit_memory = 1
kernel.msgmnb = 65535
kernel.msgmax = 65535
net.ipv4.ip_local_port_range = 10240 61440
net.ipv4.tcp_keepalive_time = 1800
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
##############################


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# 无状态服务器调整 , 可能会使连接丢失 , 比如网页session                       #
# 不适合需要登录的服务器场景 , 但是适合高并发服务器,比如纯redis服务器   #
############################################
#启用timewait 快速回收
net.ipv4.tcp_tw_recycle = 1
#开启重用 , 允许将TIME-WAIT sockets 重新用于新的TCP 连接
net.ipv4.tcp_tw_reuse = 1
#CLOSE_WAIT超时时间
net.ipv4.tcp_fin_timeout = 1
#当keepalive 起用的时候，TCP 发送keepalive 消息的频度。缺省是2 小时,单位秒 , 指的是60秒检查一次tcp是否存活
net.ipv4.tcp_keepalive_time = 60

###########参数复制版############
net.core.somaxconn = 32768
vm.overcommit_memory = 1
kernel.msgmnb = 65535
kernel.msgmax = 65535
net.ipv4.ip_local_port_range = 10240 61440
net.ipv4.tcp_keepalive_time = 60
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 1
##############################

#执行以下命令使配置生效
sysctl -p