UDP Buffer Size

Linux UDP缓冲的设置

当UDP服务器高并发时，需要关注UDP缓冲区的大小是否足够，如果太小可能会导致UDP报文的抛弃，可以使用以下语句设置：

sudo sysctl -w net.core.rmem_default=20971520

sudo sysctl -w net.core.rmem_max=20971520

sudo sysctl -w net.core.wmem_default=20971520

sudo sysctl -w net.core.wmem_max=20971520

ulimit -n 10240

sudo sysctl -w net.ipv4.udp_mem='1073741824 10737418240 107374182400'

sudo sysctl -w net.ipv4.udp_rmem_min='1073741824'

sudo sysctl -w net.ipv4.udp_wmem_min='1073741824'

sudo vim /etc/sysctl.conf

kernel.shmall = 2097152
kernel.shmmax = 4294967295
fs.file-max = 6553600
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 20971520
net.core.rmem_max = 20971520
net.core.wmem_default = 20971520
net.core.wmem_max = 20971520
net.ipv4.ip_forward = 1

sysctl -p