To all mastodon admins:
Hi! I’m Evan Phoenix, the primary author of puma, the ruby webserver that powers mastodon!
Please reply or DM me if you need tuning help! I’ve got no officiation with the mastodon, just want to see you succeed!
(Quick Tip: set WEB_CONCURRENCY to core count * 1.5 and then tune MAX_THREADS. High thread values will see diminishing returns!)
@pieceofthepie If puma is the only software running on the system, 1.5 * vCPU for WEB_CONCURRENCY is an easy place to start. If you're running sidekiq / nginx / postgres on the machine too, go for 0.8 * vCPU.
Set MAX_THREADS to 16 and then see how it feels. You'll see a top end for the thread count, and then you'll know you need more WEB_CONCURRENCY or more raw cores.
Evan Phoenix
pieceofthepie 