MySQLTuner is a script written in Perl that allows you to review a MySQL installation quickly and make adjustments to increase performance and stability. The current configuration variables and status data is retrieved and presented in a brief format along with some basic performance suggestions.

MySQLTuner supports in this last version ~300 indicators for MySQL/MariaDB/Percona Server.

MySQLTuner is maintained and indicator collect is increasing week after week supporting a lot of configuration such as Galera Cluster, TokuDB, Performance schema, Linux OS metrics, InnoDB, MyISAM, Aria, ...

You can find more details on these indicators here: Indicators description.

Compatibility:

• MySQL 5.7 (full support)
• MySQL 5.6 (full support)
• MySQL 5.5 (full support)
• MariaDB 10.1 (full support)
• MariaDB 10.0 (full support)
• Percona Server 5.6 (full support)
• Percona XtraDB cluster (full support)
• MySQL 3.23, 4.0, 4.1, 5.0, 5.1 (partial support - deprecated version)
• Perl 5.6 or later (with perl-doc package)
• Unix/Linux based operating system (tested on Linux, BSD variants, and Solaris variants)
• Windows is not supported at this time (Help wanted !!!!!)
• Unrestricted read access to the MySQL server (OS root access recommended for MySQL < 5.1)
• CVE vulnerabilites detection support from https://cve.mitre.org

WARNING

It is extremely important for you to fully understand each change you make to a MySQL database server. If you don't understand portions of the script's output, or if you don't understand the recommendations, you should consult a knowledgeable DBA or system administrator that you trust. Always test your changes on staging environments, and always keep in mind that improvements in one area can negatively affect MySQL in other areas.

Seriously - please review the FAQ section below.

Security recommandations

Hi directadmin user! We detected that you run mysqltuner with da_admin's credentials taken from /usr/local/directadmin/conf/my.cnf, which might bring to a password discovery! Read link for more details Issue #289.

What MySQLTuner is checking exactly ?

All checks done by MySQLTuner are documented in MySQLTuner Internals documentation.

Download/Installation

You can download the entire repository by using 'git clone' followed by the cloning URL above. The simplest and shortest method is:

wget http://mysqltuner.pl/ -O mysqltuner.pl
wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/basic_passwords.txt -O basic_passwords.txt
wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/vulnerabilities.csv -O vulnerabilities.csv
perl mysqltuner.pl