SharePoint 2013 databases during installation

The Configuration, Central Administration Content, and Content databases are the 3 databases that are automatically installed when you deploy SharePoint 2013.

Default database name when it is installed with the SharePoint Products Configuration Wizard

The service is unavailable in SharePoint: HTTP Error 503

I have changed the server administrator password and then restarted my machine. None of the site is working properly. Getting the below exception when I try to connect all of my SharePoint sites.  Here Administrator account is same as application pool account.

The application pool account password change functionality will work until unless if we do “IISReset” or restart the server.