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net.nf_conntrack_max = 65536000
net.netfilter.nf_conntrack_tcp_timeout_established = 1200
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.route.gc_timeout = 100
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_max_syn_backlog = 262144
net.core.netdev_max_backlog = 262144
sysctl: setting key "net.core.somaxconn": Invalid argument
net.core.somaxconn = 262144
net.ipv4.tcp_mem = 94500000 915000000 927000000
# allow testing with buffers up to 128MB net.core.rmem_max = 134217728 net.core.wmem_max = 134217728 # increase Linux autotuning TCP buffer limit to 64MB net.ipv4.tcp_rmem = 4096 87380 67108864 net.ipv4.tcp_wmem = 4096 65536 67108864 # increase the length of the processor input queue net.core.netdev_max_backlog = 250000 # recommended default congestion control is htcp net.ipv4.tcp_congestion_control = htcp # recommended for hosts with jumbo frames enabled net.ipv4.tcp_mtu_probing = 1 net.netfilter.nf_conntrack_max = 2100000 net.netfilter.nf_conntrack_max = 1048576 net.netfilter.ip_conntrack_tcp_timeout_established = 3600 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
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原文地址：http://www.cnblogs.com/ruiy/p/5212222.html
