etc/sysctl.d/local-net-tcp.conf

   1 # DOC: http://dak1n1.com/blog/12-nginx-performance-tuning
   2
   3 # NOTE: increase system IPv4 port limits to allow for more connections.
   4 net.ipv4.ip_local_port_range = 2000 65000
   5 net.ipv4.tcp_window_scaling = 1
   6
   7 # NOTE: number of packets to keep in backlog before the kernel starts dropping them.
   8 net.ipv4.tcp_max_syn_backlog = 3240000
   9
  10 # NOTE: increase socket listen backlog.
  11 net.core.somaxconn = 3240000
  12 net.ipv4.tcp_max_tw_buckets = 1440000
  13
  14 # NOTE: increase TCP buffer sizes.
  15 net.core.rmem_default = 8388608
  16 net.core.rmem_max = 16777216
  17 net.core.wmem_max = 16777216
  18 net.ipv4.tcp_congestion_control = cubic
  19 net.ipv4.tcp_rmem = 4096 87380 16777216
  20 net.ipv4.tcp_wmem = 4096 65536 16777216