Evan PhoenixNov 18, 2022

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!)

Show threadMike Perham Nov 18, 2022
@evanphx Careful with that 1.5 value. Sidekiq needs to run too.
Show threadEvan PhoenixNov 18, 2022
@getajobmike For sure! Setting WEB_CONCURRENCY to cores * 1.5 can result in puma soaking up 100% of the cpu. So if you're running sidekiq on the same cores, use 1 * cores or even 0.8 * cores is prudent.
Show threadRalf StockmannNov 18, 2022
@evanphx @getajobmike see - this is where it gets tricky. We need some sort of „calculator“ that takes cores, RAM and dedicated servers into account and gives advise _where_ to set the values, how to restart etc. This would be super-helpful for our bunch of not-so-expert admins. And we need it fast, for numbers are rising fast. The official documentation is way to fuzzy regarding tuning. 🙏
Show threadEvan Phoenix
@rstockm @getajobmike Yeah, totally agree. I'm going to setup a google form to start gathering data now, that we could use for a calculator.
Nov 18, 2022 at 11:06pmWeb
Show threadRalf StockmannNov 18, 2022
@evanphx @getajobmike brilliant, and just for the record: it‘s beyond awesome that you get in touch with us. And the actual documentation was never meant to handle a situation like this: the basic setup was fine for several years. But now we are not facing a wave, but a brick wall of new users - and need to adapt. Thanks again for your effort! ❤️
Show threadRalf StockmannNov 20, 2022

@evanphx @getajobmike maybe worth a read and how you do fit in:

https://nora.codes/post/scaling-mastodon-in-the-face-of-an-exodus/

Scaling Mastodon in the Face of an Exodus | Nora Codes