I cannot install drupal 11 on a fresh Debian install, in fact I tried everything and it's no more the fault of proxmox, but the PHP installation.
Drupal 11 needs php 8.3 to work, but Debian official repos go only to php 8.2, so I used the sury.org Debian repo to install the latest PHP version. And this is the start of the problem, this install gives me the error shown in the other post, exhausted memory.
I search in the info.php, memory related stuff, and the only difference between the "official" PHP (8.2) and sury one is that in the mysqldn section it shows statistics to yes. But I don't know how to disable it...
This is why I made a new thread because the error is not coming from anything else than the php repo of sury.org, no more a "self-hosted" or Linux proxmox issue.
EDIT : tried the same install in KVM and on my desktop, it's not working. Tried Debian 10 with official PHP and it's working
I want to install it on a Debian VM inside promox, but to eliminate the potential issues, I tried to install it inside KVM on host, and on a other PC which is running Debian as host. When installing drupal 11 I needed PHP 8.3 so I used the sury.org repo, and I think it the main problem. Because when installing drupal 10 with "official" Debian PHP (8.2) it works.