It could depend on your distro, official packaging (docker,Debian,Fedora) have MALLOC_TRIM_THRESHOLD_=131072 , but different distros could have (or not) ship with different settings.

Official settings for systemd https://github.com/jellyfin/jellyfin-packaging/blob/master/debian/conf/jellyfin

Reddit people, should be banned

The value of this tunable is the minimum size (in bytes) of the top-most, releasable chunk in an arena that will trigger a system call in order to return memory to the system from that arena.

https://www.gnu.org/software/libc/manual/html_node/Memory-Allocation-Tunables.html

MALLOC_MMAP_THRESHOLD_ is an environment variable that sets the size threshold for using the mmap system call to allocate memory instead of using the heap.

• Default: 128 KiB
• Behavior:
  • If a memory request is ≥ 128 KiB, mmap is used.
  • If < 128 KiB, the heap is used.
• Purpose:
  • Helps manage large memory allocations more efficiently.
  • Can be adjusted to optimize performance for specific applications.

Maybe too many connections, use BitTorrent calculator to recommend some settlings (just input your max upload bandwidth)

https://torrentcalc.gabe.xyz/

https://ngosang.github.io/trackerslist/

sudo mkdir /media/NewSSD # the name you like
lsblk -f # look for UUID of new ssd

then add it to fstab https://wiki.archlinux.org/title/Fstab

Something like

UUID=<insert drive UUID> /media/NewSSD ext4 defaults 0 2

Make sure you use the correct filesystem (e.g. ext4 or other)

• RiMusic https://github.com/fast4x/RiMusic
• SimpMusic https://github.com/maxrave-dev/SimpMusic
• OuterTune https://github.com/OuterTune/OuterTune
• Metrolist https://github.com/mostafaalagamy/Metrolist
• InnerTune https://github.com/z-huang/InnerTune

Any of these (YouTube Music) players are better choices than using an extension on a browser.
Also better features like lyrics, better interface…