Hi folks,
I’m using now Plex from Linuxserver.io image for a while and quite happy with it 
I’m monitoring my host with Grafana/Prometheus and I have noticed that my host SWAP memory usage is increasing slowly every day.
I have used for smem and I have noticed that it’s mainly the Plex container that is using SWAP space.
$ smem -s swap -r
PID User Command Swap USS PSS RSS
3005268 adm /usr/lib/plexmediaserver/Pl 440 78632 79543 81180
3533339 adm /usr/bin/python3 /usr/bin/s 0 8120 8945 14572
3503301 adm -bash 0 4532 4593 6884
3503210 adm /usr/libexec/gvfs-mtp-volum 0 808 975 6528
3503201 adm /usr/libexec/goa-identity-s 0 1520 2036 9512
3503187 adm /usr/libexec/goa-daemon 0 18500 20494 34688
3503181 adm /usr/libexec/gvfs-goa-volum 0 784 1015 6404
3503175 adm /usr/libexec/gvfs-gphoto2-v 0 1012 1294 7344
3503152 adm /usr/libexec/gvfs-afc-volum 0 1252 1622 8916
3503127 adm /usr/libexec/gvfs-udisks2-v 0 2132 2650 10048
3503112 adm /usr/libexec/gvfsd-fuse /ru 0 988 1192 6912
3503081 adm /usr/libexec/gvfsd 0 968 1321 7736
3503046 adm /usr/bin/dbus-daemon --sess 0 584 752 4476
3503040 adm /usr/libexec/tracker-miner- 0 9376 11684 24404
3503036 adm /usr/bin/pulseaudio --daemo 0 3964 4913 14724
3503019 adm /lib/systemd/systemd --user 0 3032 3973 10228
3005428 adm /usr/lib/plexmediaserver/Pl 0 1692 2226 3460
3005426 adm /usr/lib/plexmediaserver/Pl 0 6584 7313 8752
3005294 adm Plex Plug-in [com.plexapp.s 0 34092 34382 35188
I’m using Portainer with agent and Docker Compose to deploy for all my containers.
Also all containers are still up-to-date thanks to watchtower monitoring running.
Here is my docker-compose file used within Portainer to deploy for Plex
version: "3.8"
services:
plex:
image: lscr.io/linuxserver/plex
container_name: plex
hostname: plex
tty: true
#network_mode: host
labels:
- "com.centurylinklabs.watchtower.enable=true"
environment:
- PUID=1000
- PGID=1000
- VERSION=docker
- PLEX_CLAIM= #optional
- TZ=Europe/Paris
volumes:
- "config:/config"
- "transcode:/transcode"
- "/mnt/seedbox/enfant:/child"
- "/mnt/seedbox/parent:/movies"
devices:
- "/dev/dri:/dev/dri"
mac_address: 02:42:c0:a8:01:93
networks:
default:
ipv4_address: 192.168.1.147
restart: unless-stopped
networks:
default:
external:
name: macvlan-unifi
volumes:
config:
transcode:
My host has 8Gb of RAM and usually not used more than 30% so still have 5Gb free memory.
I don’t understand why Plex container is using SWAP space and is there a way to change this settings ? I would prefer Plex container to use RAM instead of SWAP.
Many thanks for your support
Cheers
Cyril