mysql is dead but subsys locked

Question

I am using PHP-mysql on Linux (RHEL 5.0) For First Time
When I tried to connect to MySQL from my PHP Script using mysqli_connect.
It Displayed

Answer 1

The problem I meet in the project is because of the disk space run out.

The server that MySQL is running run out the disk space, business project's log is too large. The result is that MySQL restart failed.

It is one probability and you can have a try.

du -sh *

and

service mysqld restart