What is this and why is it slowing my computer down?

Question

My Macbook has been running really slow today, so I went to Activity Monitor to see what's hogging the memory and it seems that "AddressBookShari" is the culprit. I assume it's some sort of address book sharing, but I don't know. It's taking 570+ MB of real memory! If I kill it, it still comes back.
What exactly is this, and how can I make it stop hogging my resources?

Answer 1

OK, then the sharing is done from your other computer. When you subscribe to it that causes a "shared" connection between each computer. That is why the process is running. I wouldn't worry too much about it, though. When you aren't using Address Book the process will become idle and any memory it uses that's no longer needed will move to the Inactive RAM pool and become available to other applications.
If you don't use the Address Book you can always "unsubscribe" from the office computer.
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