set rate-limit connections global

Set the process-wide connection rate limit.

Description Jump to heading #

You can limit the rate at which the load balancer accepts new connections by setting the global setting maxconnrate. In the snippet below, 1,000 connections per second are allowed:

haproxy
global
  maxconnrate 1000

haproxy
global
  maxconnrate 1000

Note that this limit is process-wide, so it is possible for one frontend to consume the majority of the capacity. However, you can also set a per-frontend limit with either the rate-limit sessions directive or with a stick table.

Use the set rate-limit connections global command to change the global maxconnrate setting dynamically.

Examples Jump to heading #

Below, we set the global connection rate limit to 5,000 connections per second:

bash
echo "set rate-limit connections global 5000" | \
  sudo socat stdio tcp4-connect:127.0.0.1:9999

bash
echo "set rate-limit connections global 5000" | \
  sudo socat stdio tcp4-connect:127.0.0.1:9999

See also Jump to heading #

• set rate-limit http-compression global
• set rate-limit sessions global
• set rate-limit ssl-sessions global