Is my box ok?

I've recently have some slowness in sites on my server. So I was just curious to see if my memory/CPU usage was ok. I'm not sure how to read everything. Can someone help me explain how to read this...or if my box is in good shape?

Here is a screenshot:
http://img101.imagevenue.com/img.php...Untitled_1.jpg

Thank you.

 

 

 

 

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