# 打开 BBR 拥塞控制算法
net.ipv4.tcp_congestion_control = bbr
net.core.default_qdisc = fq

# 系统所有进程一共可以打开的文件数量， 每个套接字也占用一个文件描述字
fs.file-max = 1491124

# 增加 TCP 最大缓冲区大小
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.rmem_default = 65536
net.core.wmem_default = 65536
net.core.netdev_max_backlog = 65535
net.core.somaxconn = 65535

# TCP 内存优化
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
net.ipv4.tcp_mem = 5120 10240 20480
net.ipv4.tcp_max_syn_backlog = 65535
net.ipv4.tcp_max_tw_buckets = 55000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 0
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_fastopen=3
net.ipv4.tcp_keepalive_time=7200
net.ipv4.tcp_keepalive_intvl=15
net.ipv4.tcp_keepalive_probes=3
net.ipv4.tcp_mtu_probing = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.ip_forward = 1