MySql server + smtp server shutdown

Hi folks,

I have very strange problem since past few days i have noticed my mysql server and smtp server shuts down on its own.

i am running on centos4.5 interworx 3.0.2 512 ram mysql+php website.

any ideas guys?

I solved the problem. I guess suddenly i needed more memmory upgrade from 512 to 768 fixed the issue.