The Plex cost 100% cpu useage

[kuanos]

Server Version#:1.24.5
Player Version#:n/a

Hi , I’m confused about what I’m facing:

1. My server CPU running at 100% usage 24 hours every day when I’m not playing, plex server have no task in background;
2. Plex server‘s CPU usage at about 50% of all;
3. When I close the Plex server, there’s several “Plex Media Serv” services in my process panel, and everyone use 10% CPU, total at about 70%.
4. I can not turn off these services with SSH.

Would you please help me with these issues~

[ChuckPa]

With Plex stopped (disabled in App Center) – Restart QTS

Verify the machine is still idle

Then start Plex.

Let it sit idle for 5-10 minutes.

Please go to Settings - Server - Troubleshooting - Download Logs

It will give you a ZIP file.

please attach that here so I can look at what it’s doing.

[kuanos]

Thank you for reply me. Here’s the log zip.
Plex Media Server Logs_2021-11-30_12-11-05.zip (4.7 MB)

[ChuckPa]

@kuanos

Do you have your torrent files downloading to a directory Plex monitors ?

[kuanos]

Yes, I think there are some torrent files in the dirctory

[ChuckPa]

When a torrent is active, it will trigger PMS to rescan and analyze. It can also cause it to generate new thumbnail images. This will continue to happen each time the file is modified

Recommended practice –

1. have torrents download (intermediate area)
2. When they are complete, move the finished file(s) to your Plex media directories.

I know there are several clients which will do this.

[kuanos]

Hi, I checked the directories plex media monitoring, there are no .torrent files in it.

but I use the same directories as EMBY server data libraries and set them to save EMBY files in the libraries. Will these were the reasons that cause PLEX to rescan and analyze all day?

[Blkbyrd]

@kuanos

there are no .torrent files in it.

I don’t think @ChuckPa was talking about the .torrent files. He was talking about downloading those torrents directly to the directories that Plex monitors for content. Because of the way torrents download, they will cause the scanner in Plex to go nuts as it sees chunks of the files being deposited over and over again in the directories. This causes the scanner to run every single time it sees one of those chunks drop into the directory, subsequently causing your servers CPU to load up to 100%. You have two options to fix this. Download the files to a staging directory, I use a /MoveToServer folder and then move them myself, or turn off all the auto detection and scanning, making sure to manually scan the libraries after each addition you make to the library instead of letting Plex autodetect changes to the directory and triggering a scan.

[ChuckPa]

Regarding emby,

Clarify ?

Plex and Emby sharing the same media ?

-or-

Plex monitoring the directories where Emby stores its internal files ?

If you have PMS monitoring Emby’s DATA directories (it’s database and internal files) – of course it’s going to go nuts.

[kuanos]

Thank you very much, I will look into it.
The “transmission” App I use has a function that seems it could download files in a temporary folder when the download is finished it will move the files into a target folder. I holp that will be helpful.

just like this, the incomplete directory is different.

[kuanos]

@ChuckPa

Plex and Emby sharing the same media ?

This is what I’m meaning.

But Emby will create some pictures or subtitles in the directories, I choose that option because I want Plex to use the same pictures or other movie information with Emby and it will save time. I will upload some pictures of them later~

I assume these files in red boxes were creating by Emby.

or, is there any chance that my Plex is too big, I checked from Qnap AppCenter it shows my Plex was 2.63TB size.

Thanks a lot~

[Blkbyrd]

Depending on the client it will download pieces to that incomplete directory and move the pieces once they are complete to the other directory causing exactly the issue you are seeing. (this is how my torrent client handles that) Torrented files are downloaded in chunks and merged together as the chunks complete from what I understand. As soon as a chunk is complete it moves it from the incomplete directory into the staging directory to join with the whole file. As for the files being created by Emby, it looks like it is just local asset type things in the movie folders themselves which shouldn’t be a problem as long as Plex is only tasked with monitoring the actual content directories and Emby isn’t constantly editing those files. If Plex is monitoring anything in the Emby installation or if Emby is constantly messing with those files, that could cause all sorts of issues.