With MariaDB, Can I MANUALLY edit the 'my.cnf' file? (it keeps recovered after reboot)

Installation
1

Hi.

My HA have MariaDB for recorder, command line access.
And (since I’m a professional DB admin) want to manually, permanently edit the
MariaDB setting for the performance.

At the ‘/etc/my.cnf’ file,
I can edit the file. But once reboot, it appears.

  1. Is there any specific option to be allowed?
  2. How to prevent the rolling back the my.cnf?
2

What kind of MariaDB installation do you have?
AFAICT, the HA addon do not use “my.cnf” but “/etc/my.cnf.d/mariadb-server.cnf”

3

Using the HA addon version.
by the way,
the “/etc/my.cnf.d/mariadb-server.cnf” file also reset(means rollback after system reboot) as well.
Any clue to solve the issue?

(HA rasbp image + HA addon MariaDB + SSH & Web Terminal without protected mode)

4

IDK. You’re not supposed to lose the overlay after a reboot, but it’s anyway a bad idea to do modifications like this because you’ll lose them for sure after an addon update