Is it me or is it nuts to be paying $1,600 a month on servers when you have just over 1000 users? Seems like something that could be run on a $50-$100 VPS.
* high volume of incoming requests from plugins sending heartbeats (https://wakatime.com/blog/23-how-to-scale-ssl-with-haproxy-a...)
* keeping all the metrics cached in real-time, many background machines dedicated to only this
* data storage & reads - if you change your Timeout Preference need to re-cache your coding activity quickly (https://wakatime.com/blog/27-fill-the-gaps-in-your-coding-ac...)