Previews and high Imaginary requests

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1

Hi,
I’m setting up the preview with imaginary.
After having generate all preview, I see a weird behavior while loading a folder with >100 pictures :

  • Nextcloud make lot of postgres call, make sense since metadata is into the database (make me increase the max_connections config).
  • Nextcloud still make POST calls to my imaginary container even if the preview already exist (making high CPU pic).

I don’t understand why there are some much calls if the preview already exist into the appdata folder.

Part of Docker compose:

  nextcloud-imaginary:
    image: nextcloud/aio-imaginary:latest
    container_name: nextcloud-imaginary
    restart: on-failure
    environment:
      PORT: 9000
    command: -cpus 5 -concurrency 80 -enable-url-source
    cap_add:
      - SYS_NICE

  nextcloud:
    image: nextcloud
    container_name: nextcloud
    hostname: nextcloud
    restart: on-failure
    expose:
      - 80
    environment:
      VIRTUAL_HOST: cloud.azlux.fr
    volumes:
      - nextcloud:/var/www/html
      - .nextcloud/custom_apps:/var/www/html/custom_apps
      - ./nextcloud/config:/var/www/html/config
      - ./nextcloud/nextcloud-data:/var/www/html/data
    depends_on:
      - postgres
      - redis

Imaginary is into the enabledPreviewProvidersconfig at first entry.
Same for the URL : preview_imaginary_url' => 'http://nextcloud-imaginary:9000'

Imaginary logs during a gallery page load :

nextcloud-imaginary    | 172.19.X.X - - [16/May/2023 09:12:46] "POST /pipeline?operations=%5B%7B%22operation%22%3A%22autorotate%22%7D%2C%7B%22operation%22%3A%22fit%22%2C%22params%22%3A%7B%22width%22%3A256%2C%22height%22%3A256%2C%22stripmeta%22%3A%22true%22%2C%22type%22%3A%22png%22%2C%22norotation%22%3A%22true%22%2C%22quality%22%3A%2260%22%7D%7D%5D HTTP/1.1" 200 93461 6.6516
nextcloud-imaginary    | 172.19.X.X - - [16/May/2023 09:12:47] "POST /pipeline?operations=%5B%7B%22operation%22%3A%22autorotate%22%7D%2C%7B%22operation%22%3A%22fit%22%2C%22params%22%3A%7B%22width%22%3A256%2C%22height%22%3A256%2C%22stripmeta%22%3A%22true%22%2C%22type%22%3A%22png%22%2C%22norotation%22%3A%22true%22%2C%22quality%22%3A%2260%22%7D%7D%5D HTTP/1.1" 200 33402 7.6617

Best regards,
Azlux

2

I use previewgenerator but has very similar problem as you observed.
Thousands of requests to imaginary when visit big folder.