Excessive RAM consumption

[TheDreadPirate]

Unused memory is wasted memory.

This should be never used as argument to justify memory consumption and poor coding practices. The issue is critical and leads to OOM denial of service when swap is disabled even when Jellyfin never used.

[16:05:24] [INF] [4] Main: Jellyfin version: 10.10.7
[16:05:25] [INF] [4] Main: Environment Variables: ["[JELLYFIN_LOG_DIR, /home/dietpi/.local/share/jellyfin/log]"]
[16:05:25] [INF] [4] Main: Arguments: ["/usr/lib/jellyfin/bin/jellyfin.dll", "version"]
[16:05:25] [INF] [4] Main: Operating system: Debian GNU/Linux 12 (bookworm)
[16:05:25] [INF] [4] Main: Architecture: Arm64
[16:05:25] [INF] [4] Main: 64-Bit Process: True
[16:05:25] [INF] [4] Main: User Interactive: True
[16:05:25] [INF] [4] Main: Processor count: 4

You're taking my comment out of context.

We get many questions about memory usage that are often along the lines of "why does Jellyfin use more than 100MB of memory".  "Why does Jellyfin cache so much data".  I assumed, initially, this was what the question would be before understanding the scale of the issue.

However, I stand by my comment when NOT in the context of OOM issues.

The devs are aware of this thread, but so far no one on the dev team has been able to reproduce the problem.

[blubkatze]

I do have the same problem that it increases until OOM.
For the time being I added a systemd timer to restart the docker container every 30minutes, so it doesn't hog all the memory and hangs the server (since the server also hosts DNS and other services inside the network).

On investigation it seems like it starts a jellyfin thread every other second[1]

inside the docker logs there is nothing from the time it says it started until the OOM[2]

No trickplay enable on any library and the following plugins enabled[3]

With enabled debug logs it looks like it does try to check the Scheduled Tasks all the time it increases the PID count[4]. Maybe the threads aren't closed after the check which contributed to the memory leak.

Happy to give you need more information if needed.



[1]
# while true; do docker stats --no-stream jellyfin; sleep 5; done
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 1.00% 304.1MiB / 3.501GiB 8.48% 0B / 0B 201kB / 213MB 832
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 2.68% 304.5MiB / 3.501GiB 8.49% 0B / 0B 201kB / 213MB 839
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.79% 304.8MiB / 3.501GiB 8.50% 0B / 0B 201kB / 213MB 844
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 1.65% 305.1MiB / 3.501GiB 8.51% 0B / 0B 201kB / 213MB 850
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.82% 305.7MiB / 3.501GiB 8.53% 0B / 0B 201kB / 213MB 859
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 1.81% 306MiB / 3.501GiB 8.54% 0B / 0B 201kB / 213MB 864
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.98% 306.4MiB / 3.501GiB 8.55% 0B / 0B 201kB / 213MB 870
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.80% 306.6MiB / 3.501GiB 8.55% 0B / 0B 201kB / 213MB 875
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 1.78% 306.9MiB / 3.501GiB 8.56% 0B / 0B 201kB / 213MB 880
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.89% 307.3MiB / 3.501GiB 8.57% 0B / 0B 201kB / 213MB 887
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 1.60% 307.2MiB / 3.501GiB 8.57% 0B / 0B 201kB / 213MB 892
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.87% 307.5MiB / 3.501GiB 8.58% 0B / 0B 201kB / 213MB 898
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 1.17% 307.7MiB / 3.501GiB 8.58% 0B / 0B 201kB / 213MB 901
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
744ff4e4d855 jellyfin 0.89% 307.9MiB / 3.501GiB 8.59% 0B / 0B 201kB / 213MB 905


[2]
[..]
Emby.Server.Implementations.ApplicationHost: Core startup complete
Main: Startup complete 0:00:36.9432776

[3]
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: AniDB 10.0.0.0
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: AniList 11.0.0.0
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: TMDb 10.10.6.0
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: Studio Images 10.10.6.0
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: OMDb 10.10.6.0
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: MusicBrainz 10.10.6.0
Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: AudioDB 10.10.6.0

[4]
[11:58:26] [INF] [64] Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor: Executing ObjectResult, writing value of type 'Jellyfin.Api.Controllers.ScheduledTasksController+<GetTasks>d__2'.
[11:58:26] [INF] [64] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Executed action Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api) in 3.0568ms
[11:58:26] [INF] [64] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executed endpoint 'Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api)'
[11:58:26] [INF] [64] Microsoft.AspNetCore.Hosting.Diagnostics: Request finished HTTP/1.1 GET http://192.168.1.31:8096/ScheduledTasks?IsEnabled=true - 200 null application/json; charset=utf-8 5.6719ms
[11:58:30] [INF] [68] Microsoft.AspNetCore.Hosting.Diagnostics: Request starting HTTP/1.1 GET http://192.168.1.31:8096/ScheduledTasks?IsEnabled=true - null null
[11:58:30] [INF] [68] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executing endpoint 'Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api)'
[11:58:30] [INF] [68] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Route matched with {action = "GetTasks", controller = "ScheduledTasks"}. Executing controller action with signature System.Collections.Generic.IEnumerable1[MediaBrowser.Model.Tasks.TaskInfo] GetTasks(System.Nullable1[System.Boolean], System.Nullable1[System.Boolean]) on controller Jellyfin.Api.Controllers.ScheduledTasksController (Jellyfin.Api).
[11:58:30] [INF] [68] Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor: Executing ObjectResult, writing value of type 'Jellyfin.Api.Controllers.ScheduledTasksController+<GetTasks>d__2'.
[11:58:30] [INF] [68] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Executed action Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api) in 4.9223ms
[11:58:30] [INF] [68] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executed endpoint 'Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api)'
[11:58:30] [INF] [68] Microsoft.AspNetCore.Hosting.Diagnostics: Request finished HTTP/1.1 GET http://192.168.1.31:8096/ScheduledTasks?IsEnabled=true - 200 null application/json; charset=utf-8 10.4557ms
[11:58:32] [INF] [69] Microsoft.AspNetCore.Hosting.Diagnostics: Request starting HTTP/1.1 GET http://192.168.1.31:8096/ScheduledTasks?IsEnabled=true - null null
[11:58:32] [INF] [69] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executing endpoint 'Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api)'
[11:58:32] [INF] [69] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Route matched with {action = "GetTasks", controller = "ScheduledTasks"}. Executing controller action with signature System.Collections.Generic.IEnumerable1[MediaBrowser.Model.Tasks.TaskInfo] GetTasks(System.Nullable1[System.Boolean], System.Nullable1[System.Boolean]) on controller Jellyfin.Api.Controllers.ScheduledTasksController (Jellyfin.Api).
[11:58:32] [INF] [69] Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor: Executing ObjectResult, writing value of type 'Jellyfin.Api.Controllers.ScheduledTasksController+<GetTasks>d__2'.
[11:58:32] [INF] [69] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Executed action Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api) in 11.8148ms
[11:58:32] [INF] [69] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executed endpoint 'Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api)'
[11:58:32] [INF] [69] Microsoft.AspNetCore.Hosting.Diagnostics: Request finished HTTP/1.1 GET http://192.168.1.31:8096/ScheduledTasks?IsEnabled=true - 200 null application/json; charset=utf-8 14.4339ms
[11:58:36] [INF] [73] Microsoft.AspNetCore.Hosting.Diagnostics: Request starting HTTP/1.1 GET http://192.168.1.31:8096/ScheduledTasks?IsEnabled=true - null null
[11:58:36] [INF] [73] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executing endpoint 'Jellyfin.Api.Controllers.ScheduledTasksController.GetTasks (Jellyfin.Api)'
[11:58:36] [INF] [73] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Route matched with {action = "GetTasks", controller = "ScheduledTasks"}. Executing controller action with signature System.Collections.Generic.IEnumerable1[MediaBrowser.Model.Tasks.TaskInfo] GetTasks(System.Nullable1[System.Boolean], System.Nullable`1[System.Boolean]) on controller Jellyfin.Api.Controllers.ScheduledTasksController (Jellyfin.Api).