this post was submitted on 01 Apr 2026
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jellyfin started stuttering recently, how to debug? (lemmy.zip)
submitted 2 months ago* (last edited 2 months ago) by illusionist@lemmy.zip to c/selfhosted@lemmy.world
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I tried "all" settings. I tried reading the logs and norhing helped. I had many months without issues. How do you guys debug it? The logs aren't too helpful for me and there are too many settings for me to play with. I've got an intel GPU with eirher QSV or VAAPI. Disabling does not work either. CPU is normal, GPU is normal. RAM is not full.

Edit:

  • one drive was failing. SMART showed a dying drive. I replaced it and everything is smooth again. That is why I couldn't find anything within the logs. And until today I didn't know how to read io properly and check for smart status.

Things to watch out for

  • cpu usage
  • gpu usage
  • right gpu tools. Properly passed to container. Properly used by jellyfin.
  • proper transcoding settings with the gpu within jellyfin
  • ram
  • storage of drives
  • io write/read speed
  • jellyfin folders on ssd, media on hdd
  • healt / smart status of drives
  • lan bottleneck
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[โ€“] gdog05@lemmy.world 2 points 2 months ago (1 children)

Are you using wireless? I'm guessing your router is occasionally being oversaturated with traffic. I would turn your streaming quality down to around 2mb and then stream to your device. You can open up Jellyfin in a browser and check the steam information in the Jellyfin Dashboard to check the speed. Keep bumping it up if you want better quality.

If you're trying to prevent transcoding, then I suggest downloading or ripping lower bitrate content.

If you happen to have a spare router, I would try adding it as an access point and keep your Jellyfin source machine and streaming device on that access point. That should keep the traffic from going through your primary router.

[โ€“] illusionist@lemmy.zip 2 points 2 months ago

A disk was failing, I updated my post