What does the 'get_misses' stat mean?

[John.H]

Hi,all:
I have a question about the stat 'get_misses'.
What does it mean?
I have two situations:
1)There is an item whose key is 'abc' in memcached,but get('abc') operation
failed with some reason,then  get_misses++
2)There is no item whose key is 'abc' in memcached,so get('abc') will return
null,then get_misses++

I do'not know which situation is correct or either is correct.

Hope some one can help me.

Best Regards for any tips.
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