Fix the error “Mysql Server has gone away (error 2006)”?

Server timed out and closed the connection. To fix, check that “wait_timeout” mysql variable in your my.cnf configuration file is large enough

 Server dropped an incorrect or too large packet. If mysqld gets a packet that is too large or incorrect, assumes that something has gone wrong and closes the connection.
 To fix, increase the maximal packet size limit “max_allowed_packet” in my.cnf file,
e.g. set max_allowed_packet = 128M, then  /etc/init.d/mysql restart.