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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。 \=~<I
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[root@c64 ~]# vi /etc/sysctl.conf 1-gX=8]]
#by sun in 20131001 z#*GPA8Em:
net.ipv4.tcp_fin_timeout = 2 tv|=`~Y
net.ipv4.tcp_tw_reuse = 1 ^jhHaN]G^
net.ipv4.tcp_tw_recycle = 1 CblL1 q8
net.ipv4.tcp_syncookies = 1 86} rz
net.ipv4.tcp_keepalive_time =600 #6m//0 u
net.ipv4.ip_local_port_range = 4000 65000 B'0Il"g'
net.ipv4.tcp_max_syn_backlog = 16384 $fvUb_n
net.ipv4.tcp_max_tw_buckets = 36000 02S(9^=
net.ipv4.route.gc_timeout = 100 yq,5M1vR
net.ipv4.tcp_syn_retries = 1 D 7E^;W)H
net.ipv4.tcp_synack_retries = 1 jKQP0 t-
net.core.somaxconn = 16384 BPOWo8TqD^
net.core.netdev_max_backlog = 16384 wb9zJAsc
net.ipv4.tcp_max_orphans = 16384 tE>:kx0*3
#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。 K^vMIo h
net.ipv4.ip_conntrack_max = 25000000 MdfkC6P
net.ipv4.netfilter.ip_conntrack_max = 25000000 fjJIF%
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 180 zC^Ib&gm>,
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120 D.GSl
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 K&h|r`W(
net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 /4f;Niem
[root@localhost ~]# sysctl –p #使配置文件生效 #>V;ZV5"
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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。 btE+.V
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即对防火墙的优化,在5.8上是 _V?Q4}7d/
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net.ipv4.ip_conntrack_max = 25000000 uI[*uAR
net.ipv4.netfilter.ip_conntrack_max = 25000000 -iHhpD9"X
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 180 ;z>YwRV
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120
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net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 [1U_c*;i
net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 vo-{3]u#=
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在6.4上是 Dhoj|lc
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net.nf_conntrack_max = 25000000 MjTKM;
net.netfilter.nf_conntrack_max = 25000000 ;>9pJ72r
net.netfilter.nf_conntrack_tcp_timeout_established = 180 Cj+=9Dc
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 P1n@E*~V5
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 h :R)KM
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 D$E9%'ir
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6.4版本上 C6~dN&q
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error: "net.bridge.bridge-nf-call-ip6tables"isan unknown key J
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error: "net.bridge.bridge-nf-call-iptables"isan unknown key x~^I/$
error: "net.bridge.bridge-nf-call-arptables"isan unknown key ycD.:w p\'
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 w lg#c6#q
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modprobe bridge echo "modprobe bridge">> /etc/rc.local