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    Jellyfin Forum Support Troubleshooting Super high CPU

     
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    Super high CPU

    Gorf
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    Junior Member

    Posts: 10
    Threads: 6
    Joined: 2024 Oct
    Reputation: 0
    Country:United States
    #1
    2026-07-11, 05:02 AM
    I'm really losing my mind trying to figure out why my Jellyfin instance runs so frickin hot. I have 16 Xeon 5-2680 @ 2.50GHz procs assigned to it with 128G of memory. When watching an H264 encoded movie, this thing runs at 95% CPU and never comes below about 85% memory usage. Its a VM and the Jellyfin instance is running in the official container that is up to date. Something has to be wrong here because the exact same media file played on Plex from the exact same VM doesn't even break a couple of percent of CPU. I play everything without transcoding. And the behaviour is the same via Roku client or Webclient. All of this power and I can only just play 1 stream at a time. And the behaviour is the same even if I am playing the file right off the local filesystem.

    This is the docker compose:

    Code:
    services:
      jellyfin:
        image: jellyfin/jellyfin:latest
        container_name: jellyfin
        user: 1000:1000
        group_add:
          - '105' #render group ID
        networks:
          - plexnet
        ports:
          - 8096:8096/tcp
        volumes:
          - ./jellyfin_config:/config
          - ./jellyfin_cache:/cache
          - multimedia:/media:ro
        restart: 'always'
        # Optional - alternative address used for autodiscovery
        environment:
          - JELLYFIN_PublishedServerUrl=http://jellyfin

    if anyone could offer any advice, I'd really appreciate it.
    TheDreadPirate
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    Community Moderator

    Posts: 16,139
    Threads: 11
    Joined: 2023 Jun
    Reputation: 483
    Country:United States
    #2
    2026-07-11, 02:50 PM
    Can you share your jellyfin log? I suspect it is transcoding for some reason. If there are ffmpeg logs, share one of those.

    The log file(s) would be located in wherever jellyfin_config is located.

    Code:
    ./jellyfin_config/config/log/log_20260711.log
    ./jellyfin_config/config/log/FFMPEG_<date and random string>.log

    Share them via pastebin.
    Jellyfin 10.11.11 (Docker)
    Debian 13 w/Xanmod amd64v3 LTS kernel
    AMD Ryzen 5500 w/32GB DDR4
    Intel Arc A380
    OS drive - SK Hynix P41 1TB
    ZFS Storage pool
        vdev1 - 6x WD Red Pro 6TB CMR in RAIDZ1
        vdev2 - 3x WD Red Pro 18TB CMR in RAIDZ1
    [Image: GitHub%20Sponsors-grey?logo=github]
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