MariaDB on CentOS 7 refuses to read some updated variables

I’m trying to change max_connections and open_files_limit for MariaDB version 5.5.60 on CentOS 7.
Since there could be multiple my.cnf files, I used mysql --help --verbose to get possible locations. Here’s the output:

Default options are read from the following files in the given order:
/etc/mysql/my.cnf /etc/my.cnf ~/.my.cnf

The /etc/mysql/my.cnf doesn’t exist and .my.cnf isn’t in my user directory, /root/ or mysql user’s directory (which doesn’t exist to begin with).
So I’m left with /etc/my.cnf. This is what it looks like:

# Disabling symbolic-links is recommended to prevent assorted security risks
max_connections = 5000
open_files_limit = 10240

# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in


# include all files from the config directory
!includedir /etc/my.cnf.d

The /etc/my.cnf.d from the last line contains server.cnf, which includes these two lines:


However, when I run systemctl restart mariadb, only the max_connections is changed, but I just can’t get it to read the new value of open_files_limit.
It keeps doing this:

MariaDB [(none)]> SHOW VARIABLES LIKE 'open_files_limit';
| Variable_name    | Value |
| open_files_limit | 1024  |
1 row in set (0.00 sec)

Do you have any idea why it’s doing this and how I could get the server to read the new value of open_files_limit?

Thank you in advance



Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

The value of open_file_limits variable can’t be higher than your system limits.

Check output of ulimit -n and change your system configuration. Preferable assign these limits not system wide, but for the user under which MariaDB server is running.

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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