Haproxy 2.1 use too much memory more than 200mb when no connections

Help!
1

i used haproxy 1.6.9 before, which only use A few hundred KB when no connections.
recently, i upgrade haproxy to 2.1 with openssl 1.1.1i. when i use the same configuration. Memory usage soared to 200MB

global
#maxconn 2000000
maxconn 2000
log 127.0.0.1 local1
#user vyos
#group users
uid 1000
gid 100
daemon
#stats socket /home/vyos/zvr/lb/sock/9e8536eed4504b49920292f2cf1cff67.sock user vyos
stats socket /home/vyos/zvr/lb/sock/9e8536eed4504b49920292f2cf1cff67.sock gid 100 uid 1000
ulimit-n 4000100

defaults
log global
option dontlognull
option http-server-close

listen 9e8536eed4504b49920292f2cf1cff67

mode tcp


timeout client 60s
timeout server 60s
timeout connect 60s

balance roundrobin
bind 192.168.31.215:8080

server nic-192.168.165.250 192.168.165.250:9090 check port 9090 inter 5s rise 2 fall 2