Connection error establish MySQL error.
Please contact Support Team as soon as a malfunctioning script is available and overused. Open connections to the database servers.
Make sure you provide the database server with a username and password, otherwise you will connect as Apache@localhost and will do not work.
Using persistent connections will lead to over-use of funds. This feature is only suitable if you have a server of your own. Once they are formed, persistent connections will be blocked.