Are you interested in increasing number of concurrent users that you BigBlueButton server can host?
Here is a simple fix to improve perofrmance of NodeJS by up to 40%, resulting in increase in the nuber of concurrent users that your server can host.
#2 Replace the last line by
PORT=3000 /usr/share/$NODE_VERSION/bin/node –max-old-space-size=4096 –max_semi_space_size=128 main.js
service bbb-html5 restart
I hope this helps in conducting better online classes on BigBlueButton!