Linux TCP异常参数指导

参考

http://blog.sina.com.cn/s/blog_e59371cc0102vg4n.htmlhttp://www.tuicool.com/articles/rUzEJ3# client使用tcp发出的包，要重传几次net.ipv4.tcp_syn_retries = 6# kernel.shmall = 4294967296net.ipv4.tcp_max_syn_backlog = 32768net.core.netdev_max_backlog = 32768net.core.somaxconn = 32768  # 全连接队列长度net.ipv4.tcp_timestamps = 0net.ipv4.tcp_synack_retries = 2net.ipv4.tcp_syn_retries = 2 # client端发送tcp第一个syn包，如果timeout，那么重传几次net.ipv4.tcp_tw_recycle = 1net.ipv4.tcp_tw_reuse = 1net.ipv4.ip_local_port_range = 1024 65535vm.swappiness = 0# strace -p 1149 -s 256 -f# listen over flow 非常高, cpu掉了一个坑，网络传输掉了一个坑# strace + tcp# http://www.tuicool.com/articles/R7BrMvu?from=timeline&isappinstalled=0# 穿越而来的请求