Mysql Not Starting
sometimes such behavior of apache/httpd (taking more and more memory until it dies or crashes the server)
can be caused by corrupted MySQL database. Try to do the following:
1) Kill the mysql server
/etc/rc.d/init.d/mysql stop
2) Repair all SQL databases:
myisamchk -r /var/lib/mysql/*/*.MYI
3) Start mysql again:
/etc/rc.d/init.d/mysql start