iOS app is making Nextcloud instance site unavailable during upload

[doc75]

Expected behaviour

During upload of photo from the iOS app, the Nextcloud instance site shall be accessible.

Actual behaviour

During upload of photo from the iOS app, the Nextcloud instance site is not accessible, leading to a timeout

Steps to reproduce

• Upload photo from your iPhone to the Nextcloud instance through the app.
• Try to connect to the Nextcloud instance site in the meantime (from the same device or from an other one) ==> not possible.

Issue not reproducible when doing the same scenario with Android app or directly from the web browser.

iOS version

12.3

App version

2.23.7.9

Server configuration

Operating system: Host: Ubuntu 18.4 (running Nextcloud, NGINX and traefik in separate docker containers)

Web server: nginx/1.15.12

Database: PostgreSQL 10.8

PHP version: PHP 7.3.5

Nextcloud version: 15.0.8

The only error message I can see related to the iOS app is the one referenced in #783
If you need more information, please let me know.

[doc75]

I have not reproduced anymore this situation since I have added a redis to my Nextcloud configuration. Not sure 100% this is the reason, but so far no more issue detected when uploading from iOS app.

[doc75]

I found out what was the issue, therefore I am putting here for reference in case anybody has the same issue.

Indeed, in the nextcloud docker image, the pm.max_children is set to 5 (it is found in /usr/local/etc/php-fpm.d/www.conf).
You can add a file named /usr/local/etc/php-fpm.d/z-local.conf with only the following line;

pm.max_children = 50

And it will work fine (for information the upload of files seems to take 10 children max in my case).