Looking at your process list and not happy with the amount of memory that your new setup is taking up?
Stop mysql:
$ stop mysql
Open the config file:
/etc/mysql/my.cnf
Add
ignore_builtin_innodb
key_buffer = 8M
query_cache_size = 0
to the options
$ start mysql
Remove bind9, samba, and any other unneeded software from the server.
Now run ps aux and free to see the effect of your changes.
$ ps aux && free