How to kill dovecot andhow to tune up mysql+php? (i´m newbie)

[Zeokat]

My system is CenOS x86_64, with 1,5GB Ram and Two processors (2x 3.2GHz).

I not use dovecot at all, how can i kill it safely? (i tryed "service dovecot stop" but it autostarts in a few minutes).

At the same time my CPU usage is high:

top - 19:04:08 up 18:58, 1 user, load average: 0.83, 0.95, 0.88

Processes into top sorted by cpu and i identified that "mysqld" and "php" are using lot of cpu.
How can i tune configs safely?

My system will run ONLY wordpress blogs, so i not need many things offered by cPanel i deactivated stats programs to try to save cpu+ram.
What is process "spamd"? Is usefull?
What about process "leechprotect", is usefull?

How to deactivate previous processes (because i think that i not need them).

All advice to setup correctly the server and finetuning are welcomed, from apache, php, mysql, etc... since my requirements are simple, only to run wordpress blogs.

Thanks.

[Zeokat]

I could stop davecot finally using WHM: Service Configuration --> Service Manager
And disabled many stuff that i not will use.

Spamd = SpamAssasin
LeechProtect = Feature of Cpanel

I finetune a little mysql with mysqltunner perl script, i followed advices.

I changed from suPHP to FastCgi and seems that cpu lowered a little.