Suddenly occurring 'Error establishing a database connection' to EC2 instance

Hi folks,

I'm working on a wordpress website that runs on AWS EC2 instance. Sometimes, my mysql server is goes down and it shows 'Error establishing a database connection' for a second and when I refresh the page again then it's get rid.

It shows that I've wrong entry of the database name, database user, port and host in wp-confg.php. But there is all okay.

Can you please give me a solutions regarding this?

I've checked ton's of articles from AWS re:post and also google. But can't figure out what's wrong actually.

Thanks.