HAProxy - Performance Tuning
- use 2 distinct NICs
- ensure connection tracking is off !!!
- add to haproxy.cfg
option http-server-close
- add to /etc/sysctl.conf
net.ipv4.ip_local_port_range = 1024 65000
- If still not good, try the following (or buy a HW load balancer)
net.ipv4.tcp_tw_reuse = 1 net.core.somaxconn = 10000 net.ipv4.tcp_max_syn_backlog = 10000 net.ipv4.tcp_synack_retries = 3 net.ipv4.tcp_max_tw_buckets = 400000 <------- not sure net.ipv4.tcp_max_orphans = 60000 <------- not sure
Learn additional tips and trinks on http://blog.exceliance.fr/category/haproxy-2/