mysqli connect error

Question

I am trying to install q2a in localhost i got an error like

Could not establish database connection. Please check the username, password and hostname in the config file, and if necessary set up the appropriate MySQL user and privileges.

I am sure that my connection is okay.I don't know why i am get this error.Your help would be appreciated.

Comments

What happens if you run this in its own PHP script:
mysqli_connect('localhost', 'username', 'password', 'database');

Replace those strings with your actual username/pw

Answer 1

RESTART MYSQL

Answer 2

I think this happens when user load is more on site.....just restarting mysql or complete server will fix problem.