cpanel server apache error

For a cpanel webserver nagios indicates critical for httpd

what can be done

1-11-2014 14:51:03 0d 0h 59m 18s 3/3 CRITICAL - Socket timeout after 10 seconds
top indicates mysqld uses cpu usage above 90
i do following
root@server234 [~]# pkill mysqld
root@server234 [~]# pkill mysqld
root@server234 [~]# service mysqld restart
mysqld: unrecognized service
root@server234 [~]# service mysql restart
ERROR! MySQL manager or server PID file could not be found!
Starting MySQL..^[[A SUCCESS!
root@server234 [~]# service mysql restart
Shutting down MySQL..... SUCCESS!
Starting MySQL. SUCCESS!
root@server234 [~]#


still no improvement

and websites on server r very slow


error_log shows:
Sat Jan 11 22:44:06 2014] [error] [client ] Cannot load the ionCube PHP Loader - it was built with configuration API220090626,NTS, whereas running engine is API220100525,NTS