ubuntu增大Tcp/Udp发送/接收缓冲区
sudo sysctl -w net.core.wmem_max=20097152
sudo sysctl -w net.core.wmem_default=20097152
sudo sysctl -w net.core.rmem_max=20097152
sudo sysctl -w net.core.rmem_default=20097152
sudo sysctl -w net.core.wmem_max=20097152
sudo sysctl -w net.core.wmem_default=20097152
sudo sysctl -w net.core.rmem_max=20097152
sudo sysctl -w net.core.rmem_default=20097152