Haproxy clear counters all

Nice article: http://www.mgoff.in/2010/07/14/haproxy-gathering-stats-using-socat/
http://code.google.com/p/haproxy-docs/wiki/UnixSocketCommands

haproxy.cfg:

  stats socket /var/haproxy level admin

$ echo "clear counters all" | socat unix-connect:/var/haproxy stdio

Munin aggregation

http://blog.loftninjas.org/2010/04/08/an-evening-with-munin-graph-aggregation/