this post was submitted on 17 Aug 2023
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Lemmy Server Performance

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Lemmy Server Performance

lemmy_server uses the Diesel ORM that automatically generates SQL statements. There are serious performance problems in June and July 2023 preventing Lemmy from scaling. Topics include caching, PostgreSQL extensions for troubleshooting, Client/Server Code/SQL Data/server operator apps/sever operator API (performance and storage monitoring), etc.

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RoundSparrow@lemmy.ml
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post inclusion, a solid WHERE clause filter before any JOIN on SELECT post (listing of posts) (lemmy.ml)
submitted 1 year ago by RoundSparrow@lemmy.ml to c/lemmyperformance@lemmy.ml
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[–] RoundSparrow@lemmy.ml 1 points 1 year ago

A core design issue of either approach is that server operators can modify the building of this data without needing to modify or restart the lemmy_server Rust code.