# DOC: http://dak1n1.com/blog/12-nginx-performance-tuning

# NOTE: increase system IPv4 port limits to allow for more connections.
net.ipv4.ip_local_port_range = 2000 65000
net.ipv4.tcp_window_scaling = 1

# NOTE: number of packets to keep in backlog before the kernel starts dropping them.
net.ipv4.tcp_max_syn_backlog = 3240000

# NOTE: increase socket listen backlog.
net.core.somaxconn = 3240000
net.ipv4.tcp_max_tw_buckets = 1440000

# NOTE: increase TCP buffer sizes.
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_congestion_control = cubic
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216