SH Process?

I found this article that makes mention of a "sh process" though it's hard to say how relevant it may be to your situation. The discussion is very techy so you may not be able to make use of it.

 

The "sh" process refers to the UNIX shell. In this case it is basically an interface that executes background commands read from input and/or a file. It is possible that while performing these actions the process became hung. Try killing it in the activity monitor or restarting your computer. Unfortunately I cannot provide much more help without being able to take a look at your computer. That being said, I don't think it's something you should be too worried about unless it continues to occur.