Linux服务器内核参数优化（适合Apache,Nginx,Squid等多种web应用）
net.ipv4.tcp_fin_timeout=2net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_keepalive_time=600
net.ipv4.ip_local_port_range=4000 65000
net.ipv4.tcp_max_syn_backlog=16384
net.ipv4.route.gc_timeout=100
net.ipv4.tcp_syn_retries=1
net.ipv4.tcp_synack_retries=1
net.core.somaxconn=16384
net.core.netdev_max_backlog=16384
net.ipv4.tcp_max_orphans=16384
#以下参数是对iptables防火墙的优化，防火墙不开会提示，可以忽略不理
net.nf_conntrack_max=25000000
net.netfilter.nf_conntrack_max=25000000
net.netfilter.nf_conntrack_tcp_timeout_established=180
net.netfilter.nf_conntrack_tcp_timeout_time_wait=120
net.netfilter.nf_conntrack_tcp_timeout_close_wait=60
net.netfilter.nf_conntrack_tcp_timeout_fin_wait=120
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