Question

How to find out the best MySQL 8 settings should I set in my.cnf

I’m using the WordPress One-Click droplet (https://marketplace.digitalocean.com/apps/wordpress) with 2 cores and 4GB of RAM, and it’s running MySQL version 8.0.29, but unlike the previous setup found with Ubuntu 16.04 and MySQL 5.7, the my.cnf is pretty much empty.

This is the only thing in the my.cnf of mysql 8:

[mysqld]
pid-file    = /var/run/mysqld/mysqld.pid
socket      = /var/run/mysqld/mysqld.sock
datadir     = /var/lib/mysql
log-error   = /var/log/mysql/error.log

I’ve been having some mysql high cpu usage, and I want to make sure that I’m not missing any configuration.

So, how do I find out which are the right settings that I should be using for WordPress site?


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Hi @mhweb,

We’ll the optimization of MySQL is usually a trial and error kind of stuff however there are different tools that can help you out. Me personally, I’ll recommend checking out the ‘MySQL Tunner’ one. The MySQLTunerscript assesses your MySQL installation, and then outputs suggestions for increasing your server’s performance and stability.

1.Download the MySQLTuner script:

wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl

Change the scripts permissions to be executable:

chmod +x mysqltuner.pl

Run the mysqltuner.pl script. You will be prompted to enter in your MySQL administrative login and password:

./mysqltuner.pl

The script will return results/suggestions which you can follow the optimize your MySQL.

Regards, KDSys