out of memory error followed by a kernel panic!

Hi Guys,

I have an ios app running on my Linode. Something really strange happens with it from time to time. The app along with It's static website both go down simultaneously. This gets temporally solved by a reboot, but it happens again eventually. Upon contacting support. They've mentioned that:-
> We pulled up your console and can see that you have an out of memory error followed by a kernel panic

> You'll want to double check your apache configuration to find the source of this issue. If you review the Apache error logs, you should be able to find more information on a resolution.

Now, I don't have any experience with shell scripting nor am I good with linux and apache. All I know is I need to solve this issue swiftly and permenantly. Could anyone help me out? In layman terms.

-Thanks a bunch!