2.6内核调优

net.ipv4.ip_local_port_range = 1024 65536  
net.core.rmem_max=16777216 
net.core.wmem_max=16777216 
net.ipv4.tcp_rmem=4096 87380 16777216  
net.ipv4.tcp_wmem=4096 65536 16777216  
net.ipv4.tcp_fin_timeout = 30 
net.core.netdev_max_backlog = 30000 
net.ipv4.tcp_no_metrics_save=1 
net.core.somaxconn = 262144 
net.ipv4.tcp_syncookies = 1 
net.ipv4.tcp_max_orphans = 262144 
net.ipv4.tcp_max_syn_backlog = 262144 
net.ipv4.tcp_synack_retries = 2 
net.ipv4.tcp_syn_retries = 2