linux sysctl 网络性能优化

问题:http-client Get http://localhost:8080  dial tcp localhost:8080 cannot assign requested address

解决方案:

修改/etc/sysctl.conf的值,向里面添加如下内容:

net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_tw_buckets = 180000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_fin_timeout = 30
net.core.netdev_max_backlog =8096
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.ip_local_port_range = 10000 65000
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_rmem = 16384 174760 349520
net.ipv4.tcp_wmem = 16384 131072 262144
net.ipv4.tcp_mem = 262144 524288 1048576

然后再用命令sudo sysctl -p 刷新配置文件即可.

其中tcp_syncookies表示net.ipv4.tcp_max_tw_buckets,net.ipv4.tcp_tw_reuse ,以及net.ipv4.tcp_tw_recycle 与timewait网络连接等待数有关,必须优化,其他可选择优化.

参考:http://blog.csdn.net/unix21/article/details/8743537