What exactly does the hit rate of memcache refer to?

What exactly does the hit rate of memcache refer to?

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What exactly does the hit rate of memcache refer to?

Hit rate = get_hits/cmd_get * 100%

• cmd_get #get command (get) total number of requests

• get_hits #Total Hits

The hit rate of memcache usually refers to the probability of hitting the memcache cache when fetching data.
Usually when memcache is used, it is a cluster. In a cluster, there will be N memcached servers. Different servers store different data, so when fetching data: (Successfully fetched from memcached Data received/Total data requests) . This is the hit rate