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。 d)kOW!5\
49=L9:
U>0bgL
复制代码 qNWSDZQ
[root@c64 ~]# vi /etc/sysctl.conf :A+}fBIN
#by sun in 20131001 9B/iQCFtj$
net.ipv4.tcp_fin_timeout = 2 JC#5CCz
net.ipv4.tcp_tw_reuse = 1 M'JCT'(X
net.ipv4.tcp_tw_recycle = 1 T%aM~dp
net.ipv4.tcp_syncookies = 1 8WpZ"
net.ipv4.tcp_keepalive_time =600 Y+eDE:4
net.ipv4.ip_local_port_range = 4000 65000 Y8c,+D,Ww
net.ipv4.tcp_max_syn_backlog = 16384 XB]>Z)
net.ipv4.tcp_max_tw_buckets = 36000 h:i FLS f
net.ipv4.route.gc_timeout = 100 4m6/ba
net.ipv4.tcp_syn_retries = 1 \f7R^;`_<R
net.ipv4.tcp_synack_retries = 1 55/)2B2J
net.core.somaxconn = 16384 sl:1P^b
net.core.netdev_max_backlog = 16384 <fHN^O0TS
net.ipv4.tcp_max_orphans = 16384 yq[.
WPve
#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\F
net.ipv4.ip_conntrack_max = 25000000 _{n4jdw%(
net.ipv4.netfilter.ip_conntrack_max = 25000000 &Zjs
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 180 Eqi;m,)
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120 'uF-}_
|
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 7=s0Pm
net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 Gl"hn
[root@localhost ~]# sysctl –p #使配置文件生效 ^^< C9
复制代码 uN1VkmtDO
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。 a^_W}gzzd
(EjlnG}5l
^XG$?2<U
即对防火墙的优化,在5.8上是 ) I(9qt>Y
%gWQ}QF
JSID@
n<b?
复制代码 &%g$Bi,G
net.ipv4.ip_conntrack_max = 25000000 1K(mdL{m5
net.ipv4.netfilter.ip_conntrack_max = 25000000 fs-LaV
0
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 180 j<`3xd'
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120 7SNdC8GZ~
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 ~gHn>]S0
net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 Vbe@S?u-
复制代码 5ArgM%
在6.4上是 r;"D>IM\
;$e)r3r`LV
8@LUL)"
复制代码 q+2A>:|
net.nf_conntrack_max = 25000000 :RxMZwa=
net.netfilter.nf_conntrack_max = 25000000 H=w):kL|
net.netfilter.nf_conntrack_tcp_timeout_established = 180 fD3'Ye<R
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 <&2<>*/.y
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 TU58
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 ;yyR_NS
复制代码 {QaO\{J=
6.4版本上 .tppCy
Km!ACA&s6
"A&A?%
error: "net.bridge.bridge-nf-call-ip6tables"isan unknown key "\T-r 2
error: "net.bridge.bridge-nf-call-iptables"isan unknown key fA]sPh4Uag
error: "net.bridge.bridge-nf-call-arptables"isan unknown key x X[WX#'f
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 mpCu,l+lo
%<+uJ'pj
UKV<Ye|
modprobe bridge echo "modprobe bridge">> /etc/rc.local