At the time of writing, Lemmyworld has the second highest number of active users (compared to all lemmy instances)
Also at the time of writing, Lemmyworld has >99% uptime.
By comparison, other lemmy instances with as many users as Lemmyworld keep going down.
What optimizations has Lemmyworld made to their hosting configuration that has made it more resilient than other instances’ hosting configurations?
See also Does Lemmy cache the frontpage by default (read-only)? on !lemmy_support@lemmy.ml
Looking at ruud’s post, he moved the instance to a pretty beefy server - it sounds like a large part of the stability is coming from overestimating performance requirements.
Correct. Lemmy is a monolithic application, so there’s only so much a server upgrade can do.
Lemmy is a monolithic application, so there’s only so much a server upgrade can do.
This is sort of true, but not really true. The default docker setup is comprised of 4 containers. I’ve seen admins report that two of those containers (lemmy and lemmy-ui) can be horizontally scaled just fine. The pict-rs and postgres containers can currently only be vertically scaled, but Postgres natively supports scaling read load.at least through read-replicas, and there’s an incomplete proposal to support scaling reads through separate db connections.
All of which is to say, it’s possible to throw 4-6 machines at a Lemmy install. It’s not truly a single-procees monolith. Would the Lemmy code be able to productively use all that hardware? I dunno. It’s scaled better tombig hardware on lemmy.world than I would have predicted last week, maybe it can fully utilize a 6 machine setup, or maybe the db falls over first and you need to fix performance bugs because sn instance can scale to the user counts necessary to support bigger hardware setups.
