PLEX causing high cpu usage (70 - 80%) when idle

[Johnster]

Hello everyone,

 

I installed unraid a few days ago and since then i've been playing with my favorite apps. Yesterday morning i had installed plex and everything was running smoothly until last night when i found my ryzen 3600 all spiked up at 70-80% usage.

 

I quickly installed netdata and found this:

 

- my cpu usage was somewhere about 75% up;

- there were disk writes at about 100 mb/s;

- my ram was used about 90%;

- my network activity went down and up without anything being downloaded/uploaded.

 

Netdata said something about iowait being the problem. Without knowing what really is the cause, i stopped plex and everything went back to normal.

 

I took this diagnosis right after i stopped plex docker.

Right now i have plex running and everything seems to be fine (for the moment). Could this be actually a faulty disk? Or bad configuration? I have 2x4TB ironwolf disks.

 

Thank you!

 

Edited February 14, 2021 by Johnster

[ChatNoir]

Are you sure there is no scheduled task in Plex causing this ?

[Johnster]

Thanks for pointing this out. I think this might have been the problem, as i observed this high cpu usage at around 02:30 am. Maybe this one should be unchecked "Perform extensive media analysis during meintenance", as all the others seem to be cpu friendly.

[asg5704]

Just wanted to give an update as well since I was running into a similar issue.

 

My CPU load was spiking from 5% to 80%

The issue was in Plex with the Intro detection / Credits detection for my TV shows. I modified my library to disable this and within seconds the CPU went to a negligble 1%-5%