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The original was posted on /r/selfhosted by /u/American_Jesus on 2025-03-30 14:02:43+00:00.

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:

Official docker,Debian,Fedora packages already contain MALLOC_TRIM_THRESHOLD_.

Not present on some docker images like linuxserver/jellyfin

PS: Reddit doesn’t allow edit post titles, needed to repost