Hello, 1.5Gib 
It’s way too much, right?
Edit: I made this command:
sudo su -s /bin/bash -c "/usr/share/php/passbolt/bin/cake passbolt action_logs_purge -r 90" www-data
But it is limited to 100000 deletions maximum, right?
Edit 2 :
The issue was indeed with my action_logs table. With over 3 million entries, it was causing the application to lag every time someone accessed it.
I truncated the table all at once.