We are working on our Moodle 3.9 deployment (upgrading from 3.8.3). Does Moodle 3.9 have full compatibility with MariaDB 10.5?
Were the betas and release candidates tested before the 3.9 release?
It was released yesterday:
https://mariadb.com/kb/en/mariadb-1054-release-notes/
I recall that MariaDB 10.3 had issues with Moodle 3.6 initially, so I want to be careful this time around.