Technical limits with Jellyfin ?

[vincen]

Theres a lot going on in that log.  The only thing out of the ordinary is ffmpeg crashing a bunch.  Can you share those ffmpeg logs with us?

For ffmpeg I have a bunch of log files as it generates one for each encoding request  Here are last ones, let me know if you need anything else  For ffmpeg I have installed on system the special version for jellyfin as indicated in configuration documentation ! https://group.vincen.org/index.php/s/MZXDYq4NxAjYRZs

Is the database on the ZFS array?  Located in /var/lib/jellyfin/data/.  Or is that directory on an SSD?

The database is on the zfs array. I have done a symlimk of /var/lib/jellyfin/data

I have noticed quite some improvements already by resetup of scheduled tasks so they run only during quiet time as suggested by @bitmap