What does the 'get_misses' stat mean?

[dormando]

2)

John.H wrote:
> 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.