Nextcloud version (eg, 20.0.5): 23.0.1-1
Operating system and version (eg, Ubuntu 20.04): latest
Apache or nginx version: nginx 1.20.2-1
PHP version: 8.1.3-1
The issue you are facing:
When opening a directory with a lot of images in my browser, nextcloud will fire lots of php-fpm workers to generate preview images. This slows down the server making viewing the images very slow. But even worse, after a while all the memory of my server is filled up, making systemd-oomd kill the php-fpm process. Disabling image previews seems to avoid this problem.
My server has 2GB of ram, so that’s way more than the minimum specs of 512mb. I there anything I can do to improve the memory usage and performance?
I’m using APCu as memory caching. I tried tweaking the number of servers in php-fpm, but even with the current numbers it runs out of memory.
My php-fpm configuration:
[nextcloud]
user = nextcloud
group = nextcloud
listen = /run/nextcloud/nextcloud.sock
env[PATH] = /usr/local/bin:/usr/bin:/bin
env[TMP] = /tmp
; should be accessible by your web server
listen.owner = http
listen.group = http
pm = dynamic
pm.max_children = 60
pm.start_servers = 6
pm.min_spare_servers = 3
pm.max_spare_servers = 9