When using ApsaraDB for Memcache, check the following items for low-hit-rate conditions:
On the ApsaraDB for Memcache server
Reading instances immediately after clearing the instance cache on the console results in no hits.
Accessing expired data results in no hits.
Check if the key was correctly read from ApsaraDB for Memcache. If the key was set to info but read as inf, it results in no hits.