Latency added when backend emits response every few seconds

@old_bear wrote:

I've set up a simple haproxy to do load balancing between my servers. Here's part of the haproxy.conf:

listen my_app
    mode http
    bind :9010
    balance roundrobin
    option forwardfor
    log global
    option httplog
    option httpchk GET /crowdtest/health
    timeout check 10s
    cookie BEC insert indirect nocache maxlife 120s
    maxconn 20480
    timeout server 30s
    timeout client 30s
    server my_backend 10.17.11.219:80 cookie 4D49D4F check inter 10s rise 3 fall 3 weight
 100 port 80

Everything works fine when my_backend sends files with static content length. However when my_backend sends 2 chunks of data using chunked transfer-encoding (the first chunk sent, 5s later send the second), haproxy adds about 500ms latency. Is haproxy waiting for my_backend to send the whole response so that it will begin to forward response?

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