Unifi Network Application - high CPU load after switching to MongoDB - RPi

I’ve recently migrated to the LSCR unifi new container for Unifi Network Application.
The previous version (GitHub - linuxserver/docker-unifi-controller) has been using well on a RPi 4 4gb. Ubuntu 22.04.3 LTS (GNU/Linux 5.15.0-1042-raspi aarch64)

I would not consider this RPi as busy; running PiHole, Portainer, Unifi and Heimdall.

Following GitHub - linuxserver/docker-unifi-network-application i have setup a docker-compose.yaml in portainer to deploy a full stack. After deploying this stack 2 weeks ago, everything was working fine.

I did see an uptick on RPi CPU load to 53% (+10%) and Memory utilization to 55%.
dmesg is not showing errors. Any reason why the cpu load went up?

---
version: "2.1"
services:
  unifi-network-application:
    image: lscr.io/linuxserver/unifi-network-application:latest
    container_name: unifi-network-application
      #profiles:
      #- donotstart
    depends_on:
      - mongodb
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=MyTz
      - MONGO_USER=unifi
      - MONGO_PASS=MyPassword
      - MONGO_HOST=mongodb
      - MONGO_PORT=27017
      - MONGO_DBNAME=unifi
      - MEM_LIMIT=1024 #optional
      - MEM_STARTUP=1024 #optional
    volumes:
      - /Opt/unifi-network-app/config:/config
    ports:
      - 8443:8443
      - 3478:3478/udp
      - 10001:10001/udp
      - 8080:8080
      - 1900:1900/udp #optional
      - 8843:8843 #optional
      - 8880:8880 #optional
      - 6789:6789 #optional
      - 5514:5514/udp #optional
    restart: unless-stopped
      
  mongodb:
    image: arm64v8/mongo:4.4.18
    restart: always
    ports:
      - 27017:27017
    environment:
      PUID: 1000
      PGID: 1000
    volumes:
      - /Opt/unifi-mongo/init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js:ro
      - /Opt/unifi-mongo/data:/data

  mongo-express:
    image: mongo-express
    restart: always
      #profiles:
      #- donotstart
    depends_on:
      - mongodb
    ports:
      - 8081:8081
    environment:
      ME_CONFIG_MONGODB_URL: mongodb://unifi:MyPassword@mongodb
      ME_CONFIG_MONGODB_SERVER: mongodb
      ME_CONFIG_BASICAUTH_USERNAME: unifi
      ME_CONFIG_BASICAUTH_PASSWORD: MyPassword
    volumes:
      - /Opt/unifi-mongo-web:/data/db
volumes:
  unifi-mongo-db:
  unifi-mongo-web:

Try removing mongoexpress, no clue what that is

its a tool to view/edit tables in Mongo DB.

Good point, i’ll stop it.