说明:本优化适合apache,nginx,squid多种等web应用,特殊的业务也可能需要略作调整。 gK|R =J
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[root@c64 ~]# vi /etc/sysctl.conf CVXytS?@x
#by sun in 20131001 UK*qKj.)
net.ipv4.tcp_fin_timeout = 2 3z;_KmM
net.ipv4.tcp_tw_reuse = 1 X5g[ :QKP7
net.ipv4.tcp_tw_recycle = 1 #pdUJ2)yM
net.ipv4.tcp_syncookies = 1 ^%y`u1ab
net.ipv4.tcp_keepalive_time =600 ;1DdjE Tr
net.ipv4.ip_local_port_range = 4000 65000 6ri\>QrF
net.ipv4.tcp_max_syn_backlog = 16384 ^Jp*B;
net.ipv4.tcp_max_tw_buckets = 36000 )y7_qxwbV
net.ipv4.route.gc_timeout = 100 ;K:8#XuV
net.ipv4.tcp_syn_retries = 1 A[UP"P~u/
net.ipv4.tcp_synack_retries = 1 U l Mi.;/^
net.core.somaxconn = 16384 &S74mV
net.core.netdev_max_backlog = 16384 Ua*&_~7kJ
net.ipv4.tcp_max_orphans = 16384 JhR W[~
#一下参数是对iptables防火墙的优化,防火墙不开会有提示,可以忽略不理。 kReG:
net.ipv4.ip_conntrack_max = 25000000 bdc\
net.ipv4.netfilter.ip_conntrack_max = 25000000 0o&}mKe
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 180 qg,Nb
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120 p {%t q$}.
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 't>r
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net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 heD,&OX
[root@localhost ~]# sysctl –p #使配置文件生效 ?p8k{N(1
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提示:由于CentOS6.X系统中的模块名不是ip_conntrack,而是nf_conntrack,所以在/etc/sysctl.conf优化时,需要把net.ipv4.netfilter.ip_conntrack_max 这种老的参数,改成net.netfilter.nf_conntrack_max这样才可以。 E;-qP)yU
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即对防火墙的优化,在5.8上是 )bWrd$X
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net.ipv4.ip_conntrack_max = 25000000 kHU"AD}.
net.ipv4.netfilter.ip_conntrack_max = 25000000 %RFYm
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 180 {fG|_+tl3o
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120 |>sv8/!
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 :Ee ?K
net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 k46gY7y,9
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在6.4上是 }GRMZh_8
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net.nf_conntrack_max = 25000000 v!!;js^
net.netfilter.nf_conntrack_max = 25000000 ] piM/v\
net.netfilter.nf_conntrack_tcp_timeout_established = 180 +wts 7,3
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 5&|5 a} 8
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 foyB{6q8
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 #`58F .
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6.4版本上 @$ftG
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error: "net.bridge.bridge-nf-call-ip6tables"isan unknown key AI R{s7N
error: "net.bridge.bridge-nf-call-iptables"isan unknown key xtsL8-u f
error: "net.bridge.bridge-nf-call-arptables"isan unknown key <hMtE/05B
这个错误是由于自动处理可载入的模块bridge没有自动载入,解决办法是自动处理开载入的模块ip_conntrack qhN[Dj(d
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rx}*u3x=
modprobe bridge echo "modprobe bridge">> /etc/rc.local