When I am trying to reach my Wordpress sites (all hosted on the same server) I gets this error message; "Error establishing a database connection". The sites worked earlier today and I haven't changed anything since then. I have checked my wp-config.php's and they got the correct username, password, db_name and db_host. What could be the problem?
If you don't change anything then the database is down, wait for a few minutes or hours, it will come back. If until tomorrow still shows the same error message, contact the host.
Hmm, isn't the database server "integrated" in a VPS? I can login to phpMyAdmin and create new databases.