SOLVED: Jellyfin has become super slow after update

[wayne]

I'm running jellyfin on a Synology 920+ with docker and never had any issues with it. I recently did a update to the newest Synology OS (DSM 7.2) and since then jellyfin has become very slow. As soon as you have 2 streams running at the same time the UI is loading really slowly, up to 30 seconds or a minute for every click in the library. Also streams take really long to start. There is more than enough resources available. The CPU is mostly idling and there is plenty of free RAM. I also run a plex server on docker and can run 6 streams or more without any performance lag in the streams or in the UI. 

I'm using the same settings in the docker and jellyfin for the last 2 years. I'm not sure if it is because of the update or if it happend before and I just didn't realized it. 
I append a log file while I was running 4 streams at the same time. There are a lot Slow HTTP response errors, which I read shouldn't concern me.

Does anyone has experienced something like this before?

I'm running 10.8.13 on a Synology NAS in docker

[TheDreadPirate]

Is Jellyfin's database and and metadata directory running on a HDD?

[wayne]

Yes, the whole docker folder and media folder is on a HDD.


That was the problem.
Moved the docker folder to a nvme drive and now have full performance!
Thanks for that hint!