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PSA: If your Jellyfin is having high memory usage, add MALLOC_TRIM_THRESHOLD_=100000 to environment (lemm.ee)
submitted 1 year ago* (last edited 1 year ago) by American_Jesus@lemm.ee to c/selfhosted@lemmy.world
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Many users reported high memory/RAM usage, some 8GB+.

In my case gone from 1.5GB+ to 400MB or less on Raspberry Pi 4.

Adding MALLOC_TRIM_THRESHOLD_=100000can make a big difference.

With Docker:
Add to your docker-compose.yml and docker compose down && docker compose up -d

...
environment:
  - MALLOC_TRIM_THRESHOLD_=100000
...

With systemd:
Edit /etc/default/jellyfin change the value of MALLOC_TRIM_THRESHOLD_ and restart the service

# Disable glibc dynamic heap adjustment
MALLOC_TRIM_THRESHOLD_=100000

Source: https://github.com/jellyfin/jellyfin/issues/6306#issuecomment-1774093928

Official docker,Debian,Fedora packages already contain MALLOC_TRIM_THRESHOLD_.
Not present on some docker images like linuxserver/jellyfin

Check is container (already) have the variable
docker exec -it jellyfin printenv | grep MALLOC_TRIM_THRESHO LD_

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[-] boreengreen@lemm.ee 0 points 1 year ago* (last edited 1 year ago)

How well does jellyfin work on a rpi? How many simultaneous 1080p users with AVC\ACC media can it do? Active cooling?

[-] Hiro8811@lemmy.world 3 points 1 year ago

Didn't try but depends on which RPI. 4? 5?

[-] sugar_in_your_tea@sh.itjust.works 1 points 1 year ago

Also depends on the storage medium (SD? SSD?), assuming there's no transcoding.

this post was submitted on 31 Mar 2025
104 points (92.6% liked)

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