Check Too many connection issues for MYSQL

-- This command will return you the value of max_connections variable
SHOW VARIABLES LIKE '%max_connections%';

-- This command will show you all processes and connections.
SHOW FULL PROCESSLIST;


http://www.microshell.com/database/mysql/mysql-too-many-connection-errors/

http://dev.mysql.com/doc/refman/5.5/en/too-many-connections.html

http://dev.mysql.com/doc/refman/5.5/en/show-processlist.html