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Lemmy Devs: could you shed light on the range of scalability issues we're about to see with the reddit influx? (sopuli.xyz)

submitted 2 years ago* (last edited 2 years ago) by theory@sopuli.xyz to c/lemmy_support@lemmy.ml

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I expect lemmy.ml to be hugged to death, but that's just a DoS.

More interestingly would be how the activitypub network reacts under reddit-like loads and behaviour, and as i understand it, things shouldnt be too bad?

Is lemmy scalable?

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[–] nutomic@lemmy.ml 23 points 2 years ago

There are a few main problems with performance which we are currently fixing:

Websocket is inefficient. We are removing it and switching to HTTP API. https://github.com/LemmyNet/lemmy-ui/pull/1081
There are some slow SQL queries which we need to improve. https://github.com/LemmyNet/lemmy/issues/2877
There is no caching. This PR adds it, but will only work after rewriting to HTTP. https://github.com/LemmyNet/lemmy-ansible/pull/75

Federation isnt causing any performance problems, its all due to database reads from local users.