As Tom said.
But for lazy people like me who uses docker, I always start my new broker directly to 1000 scaling tier like this 
docker run -d -p xxxx:xxxx --shm-size=2g --env username_admin_globalaccesslevel=admin --env username_admin_password=admin –env system_scaling_maxconnectioncount=1000 --name=solace solace/solace-pubsub-standard