Optimizing your MySQL database can help it run better, reduce fragmentation, and ultimately give you a boost in performance. In many cases, you can optimize your MySQL database using a graphical frontend, such as phpMyAdmin, but in some instances it is quicker and easier to run the command from within an SSH session, especially if you are already working on another task from within the secure shell.
To optimize a single table in a database, you simply run:
mysqlcheck -op database-name
The “-o” flag tells MySQL to optimize the database, and the “-p” flag will cause it to prompt you for your password. With this string, MySQL will prompt you for the password of the currently logged-in user. If you are logged in as root, your password should work for every database. If you are logged in as a different user than the user responsible for the database you want to optimize, you will need to add the user flag:
mysqlcheck -op -u username database-name
Assuming you are the system administrator of your dedicated server, you may also want the ability to optimize all of the database at once. To do this, use the “all-databases” setting:
mysqlcheck -op -u user_name –all-databases
For more information about optimizing MySQL databases and database tables, consult the MySQL official documentation.