Watch this video for a step by step process on How to Restart MySQL Server from WHM
You may have to restart MySQL server if you have made some configurations like applying an update to the software or a rolling restart of the server. However, you can safely interrupt any presently running processes, provided you restart the server from your WHM root account.
Warning: There is a chance you may lose unsaved data and customizations if you restart the MySQL service. We recommend you take a full backup before proceeding with it.
To Restart MySQL Server from WHM
1. Log in to the root account of the WHM panel.
2. Select the Restart Services option from the navigation menu.
3. Click on SQL Server (MySQL).
4. A message asking for your confirmation to restart the service will appear. Click the Yes button to confirm.
The system will begin the process of restarting the MySQL server. It will take some time for the server to restart. Meanwhile, some functions on your website may stop working temporarily. It is better if you do it in hours when your web traffic is the lowest.