Are there any Discord servers or somewhere in the Matrix to chat about hosting a Lemmy instance? I’ve got Lemmy running, but I think there are several of us in the same boat struggling with federation performance issues and it might be good to have some place to chat real time.

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3 points

My server is struggling with federation. Pretty much everything I see in the logs with debug turned on is this:

2023-06-20T01:55:28.018419Z WARN Error encountered while processing the incoming HTTP request: lemmy_server::root_span_builder: Header is expired

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2 points

This is exactly what I am seeing. I just tried upping federation_worker_count in the postgres database. I saw someone in another thread mention trying that so we’ll see.

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1 point

Upping worker count significantly reduced those in my case. If Lemmy is maxing out your CPU too much though by chance, you may need to upgrade.

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There is an nginx setting you can tune as well. I believe it was worker threads? Can’t remember the exact one and too tired to ssh into my instance to check.

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This post says that the worker threads only effect outbound federation. I’m struggling with my instance not receiving anything inbound.

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3 points

From the docs / troubleshooting:

“Also ensure that the time is accurately set on your server. Activities are signed with a timestamp, and will be discarded if it is off by more than 10 seconds.”

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Thanks for pointing this out. I got hopeful that it may be a simple fix, but unfortunately NTP is set up and synchronized.

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Yeah, I’ve been selfhosting for nearly a decade and setting up lemmy was, surprisingly, a challenge, and not because it was all that difficult but because the documentation was contradictory, out-of-date, or non-existent in key areas. Federation is my current hurdle, too. It would be nice to have a place to compare notes. Maybe here?

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I would be up for something like this. I host my own 8nstance as well. I’m having issues updating communities though. Every time I try I get the button spinner of death. I think in the end, the software is buggy and needs some time to get the bugs worked out, but it is frustrating.

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