．https://blogs.dropbox.com/tech/2017/09/optimizing-web-servers-for-high-throughput-and-low-latency/
http://www.queryadmin.com/1654/tuning-linux-kernel-tcp-parameters-sysctl/
https://blogs.dropbox.com/tech/2017/09/optimizing-web-servers-for-high-throughput-and-low-latency/
Don’t USE
net.ipv4.tcp_tw_recycle=1
—don’t use it—it was already broken for users behind NAT, but if you upgrade your kernel, it will be broken for everyone.
net.ipv4.tcp_timestamps=0
—don’t disable them unless you know all side-effects and you are OK with them. For example, one of non-obvious side effects is that you will loose window scaling and SACK options on syncookies.
https://read01.com/zh-tw/KBgmj7.html
Don’t USE
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_tw_reuse=1 /*Only you know, sometime can do*/
aws linux 官方
https://aws.amazon.com/tw/amazon-linux-ami/2017.09-release-notes/
ubuntu
https://segmentfault.com/a/1190000008395823
https://farer.org/2017/05/18/build-kernel-with-bbr-on-ec2-amazon-linux/
修改/etc/sysctl.conf文件，加入如下两行:
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr
檢查
cat /proc/sys/net/ipv4/tcp_congestion_control
https://home.gamer.com.tw/creationDetail.php?sn=3296359
