dd if=/dev/zero of=/usr/local/apache2/htdocs/1G.bin bs=1G count=1

vi /usr/local/apache2/conf/httpd.conf # add "Include conf/h2-test.conf" at the end
vi /usr/local/apache2/conf/h2-test.conf

###

# cat /usr/local/apache2/conf/h2-test.conf

ServerName test-server.none

LoadModule ssl_module modules/mod_ssl.so
LoadModule socache_shmcb_module modules/mod_socache_shmcb.so
Include conf/extra/httpd-ssl.conf

LoadModule http2_module modules/mod_http2.so
Protocols h2 http/1.1

ServerLimit 16
StartServers 2

ThreadLimit 100
ThreadsPerChild 100

MinSpareThreads 200
MaxSpareThreads 800
MaxRequestWorkers 800