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Outage today (2023-07-31) from 02:00 UTC - 05:45 UTC (self.lemmyworld)

submitted 1 year ago by ruud to c/lemmyworld

38 comments fedilink hide all child comments

Lemmy.world has been down between 02:00 UTC and 05:45 UTC. This was caused by the database spiking to 100% cpu (all 32 cores/64 threads!) due to inefficient queries been fired to the db very often.

I’ve collected the logs and we’ll be checking how to prevent this. (And what caused this)

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[+] Yoz -20 points 1 year ago (2 children)

People move to smaller instances so that with such outage not everyone is affected. Use fediverse as its supposed to be used.

[–] Spacebar 17 points 1 year ago (2 children)

What's the name of the server you are running?

A large instance today will be a small instance in the future. There are hardly any users on lemmy compared to other more established platforms. So if lemmy is to ever handle a lot more users, stress testing the code makes a lot of sense.

What's going to happen in the future, do you expect there to be 50,000 servers? That's unrealistic.

[–] [email protected] 3 points 1 year ago (1 children)

Instances should be divided more into groups of Communities. So they theoretically don't grow infinitely, only as high as the "group" if communities grows. Ex. An NBA or Sports instance containing /c/NBA /c/NFL /c/NHL and all the related teams. Or similar to the programming.dev instance all being programming and development. While these would grow it would grow at a much slower rate than everything in one instance and be much more maintainable.

Of course this is somewhat of a social construct so everyone has to be in agreement with how to handle this and move accordingly, which won't happen.

Long-term long-term for federation there has to be a distributed computing solution that allows the users to contribute to hosting.

[–] [email protected] 2 points 1 year ago

Ex. An NBA or Sports instance containing /c/NBA /c/NFL /c/NHL and all the related teams.

https://fanaticus.social/

[–] cerevant 3 points 1 year ago (2 children)

I can’t claim to know what the designers intended, but having users spread across a large numbers of servers is terribly inefficient for how Lemmy works: each server maintains a copy of each community that it’s users are subscribed to, and changes to those communities need to be communicated across each of those instances.

Given this architecture, it is much more efficient and robust to have users concentrate on what are effectively high performance cacheing servers, and communities spread out on smaller, interest focused instances.

[–] ewe 0 points 1 year ago

Yeah, I think this is the way things should move in the future. Have community vs user focuses on servers instead of having the same server get hit with both high community/comment usage and a server with lots of login/audit/user browsing requests. Servers with big communities could focus on stability and perfomance. Servers with users could focus on cool UIs and features for their users.