In this tutorial, we will show you how to install and configure MySQLTuner on your CentOS server. For those of you who didn’t know, 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 are retrieved and presented in a brief format along with some basic performance suggestions. It is really easy to use and it is recommended to analyze your Linux VPS regularly in order to get the best performances.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘
sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation MySQLTuner on a CentOS server.
- A server running one of the following operating systems: CentOS Linux.
- It’s recommended that you use a fresh OS install to prevent any potential issues.
non-root sudo useror access to the
root user. We recommend acting as a
non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.
Install MySQLTuner on CentOS
Step 1. First, let’s start by ensuring your system is up-to-date.
sudo yum update sudo yum install epel-release
Step 2. Installing MySQLTuner.
Download the MySQLTuner script as follows:
wget --no-check-certificate https://raw.github.com/major/MySQLTuner-perl/master/mysqltuner.pl
We must make it script executable:
chmod +x mysqltuner.pl
To run MySQLTuner, you can execute the command:
As a result, you should get something like this:
-------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance Reduce or eliminate unclosed connections and network issues When making adjustments, make tmp_table_size/max_heap_table_size equal Reduce your SELECT DISTINCT queries which have no LIMIT clause Variables to adjust: query_cache_type (=4) tmp_table_size (> 8M) max_heap_table_size (> 8M)
The script recommends adjusting or adding the following variables in the MySQL
my.cnf file. The location of
my.cnf is normally
/etc/mysql/my.cnf depending on the Linux distribution that is installed on your server.
Congratulations! You have successfully installed MySQLTuner. Thanks for using this tutorial for installing MySQLTuner to optimize your MySQL on the CentOS system. For additional help or useful information, we recommend you check the official MySQLTuner website.